diff --git a/src/Microsoft.OpenApi.OData.Reader/Generator/OpenApiRequestBodyGenerator.cs b/src/Microsoft.OpenApi.OData.Reader/Generator/OpenApiRequestBodyGenerator.cs
index 04418da5..a079631d 100644
--- a/src/Microsoft.OpenApi.OData.Reader/Generator/OpenApiRequestBodyGenerator.cs
+++ b/src/Microsoft.OpenApi.OData.Reader/Generator/OpenApiRequestBodyGenerator.cs
@@ -66,15 +66,17 @@ public static OpenApiRequestBody CreateRequestBody(this ODataContext context, IE
                 Properties = new Dictionary<string, OpenApiSchema>()
             };
 
+            bool allParamsNullable = true;
             foreach (var parameter in action.Parameters.Skip(skip))
             {
+                allParamsNullable &= parameter.Type.IsNullable;
                 parametersSchema.Properties.Add(parameter.Name, context.CreateEdmTypeSchema(parameter.Type));
             }
 
-            OpenApiRequestBody requestBody = new OpenApiRequestBody
+            OpenApiRequestBody requestBody = new()
             {
                 Description = "Action parameters",
-                Required = true,
+                Required = !allParamsNullable,
                 Content = new Dictionary<string, OpenApiMediaType>()
             };
 
diff --git a/src/Microsoft.OpenApi.OData.Reader/Microsoft.OpenAPI.OData.Reader.csproj b/src/Microsoft.OpenApi.OData.Reader/Microsoft.OpenAPI.OData.Reader.csproj
index e61a7d0f..ab383bf1 100644
--- a/src/Microsoft.OpenApi.OData.Reader/Microsoft.OpenAPI.OData.Reader.csproj
+++ b/src/Microsoft.OpenApi.OData.Reader/Microsoft.OpenAPI.OData.Reader.csproj
@@ -28,6 +28,7 @@
 		- Adds nullable to double schema conversions #581
 		- Updates tag names for actions/functions operations #585
 		- Creates unique operation ids for paths with composable overloaded functions #580
+		- Sets request body required property to false when all action parameters are optional #582
 	</PackageReleaseNotes>
     <AssemblyName>Microsoft.OpenApi.OData.Reader</AssemblyName>
     <AssemblyOriginatorKeyFile>..\..\tool\Microsoft.OpenApi.OData.snk</AssemblyOriginatorKeyFile>
diff --git a/test/Microsoft.OpenAPI.OData.Reader.Tests/Generator/OpenApiRequestBodyGeneratorTests.cs b/test/Microsoft.OpenAPI.OData.Reader.Tests/Generator/OpenApiRequestBodyGeneratorTests.cs
index 6abc39ee..c1ca1a7d 100644
--- a/test/Microsoft.OpenAPI.OData.Reader.Tests/Generator/OpenApiRequestBodyGeneratorTests.cs
+++ b/test/Microsoft.OpenAPI.OData.Reader.Tests/Generator/OpenApiRequestBodyGeneratorTests.cs
@@ -36,6 +36,8 @@ public OpenApiRequestBodyGeneratorTest()
             var edmAction = new EdmAction("NS", "Checkout", boolType, true, actionEntitySetPath);
             edmAction.AddParameter(new EdmOperationParameter(edmAction, "bindingParameter", new EdmEntityTypeReference(customer, true)));
             edmAction.AddParameter("param", EdmCoreModel.Instance.GetString(true));
+            edmAction.AddParameter("param2", EdmCoreModel.Instance.GetString(false));
+
             model.AddElement(edmAction);
 
             var actionImportEntitySetPath = new EdmPathExpression("Param1/Nav2");
@@ -89,9 +91,17 @@ public void CreateRequestBodyForActionImportReturnCorrectRequestBody()
             var schema = content.Value.Schema;
             Assert.Equal("object", schema.Type);
             Assert.NotNull(schema.Properties);
-            var parameter = Assert.Single(schema.Properties);
-            Assert.Equal("param", parameter.Key);
-            Assert.Equal("string", parameter.Value.Type);
+
+            var parameters = schema.Properties;
+            Assert.Equal(2, parameters.Count);
+
+            var parameter1 = parameters.First(p => p.Key == "param");
+            Assert.Equal("param", parameter1.Key);
+            Assert.Equal("string", parameter1.Value.Type);
+
+            var parameter2 = parameters.First(p => p.Key == "param2");
+            Assert.Equal("param2", parameter2.Key);
+            Assert.Equal("string", parameter2.Value.Type);
         }
 
         [Fact]
@@ -116,6 +126,9 @@ public void CanSerializeAsJsonFromTheCreatedRequestBody()
           ""param"": {
             ""type"": ""string"",
             ""nullable"": true
+          },
+          ""param2"": {
+            ""type"": ""string""
           }
         }
       }
@@ -146,9 +159,17 @@ public void CreateRequestBodyForActionReturnCorrectRequestBody()
             var schema = content.Value.Schema;
             Assert.Equal("object", schema.Type);
             Assert.NotNull(schema.Properties);
-            var parameter = Assert.Single(schema.Properties);
-            Assert.Equal("param", parameter.Key);
-            Assert.Equal("string", parameter.Value.Type);
+
+            var parameters = schema.Properties;
+            Assert.Equal(2, parameters.Count);
+
+            var parameter1 = parameters.First(p => p.Key == "param");
+            Assert.Equal("param", parameter1.Key);
+            Assert.Equal("string", parameter1.Value.Type);
+
+            var parameter2 = parameters.First(p => p.Key == "param2");
+            Assert.Equal("param2", parameter2.Key);
+            Assert.Equal("string", parameter2.Value.Type);
         }
 
         [Fact]
diff --git a/test/Microsoft.OpenAPI.OData.Reader.Tests/Resources/TripService.OpenApi.V2.json b/test/Microsoft.OpenAPI.OData.Reader.Tests/Resources/TripService.OpenApi.V2.json
index dd93b464..436fa8a5 100644
--- a/test/Microsoft.OpenAPI.OData.Reader.Tests/Resources/TripService.OpenApi.V2.json
+++ b/test/Microsoft.OpenAPI.OData.Reader.Tests/Resources/TripService.OpenApi.V2.json
@@ -10943,7 +10943,6 @@
             "in": "body",
             "name": "body",
             "description": "Action parameters",
-            "required": true,
             "schema": {
               "type": "object",
               "properties": {
@@ -15768,7 +15767,6 @@
             "in": "body",
             "name": "body",
             "description": "Action parameters",
-            "required": true,
             "schema": {
               "type": "object",
               "properties": {
@@ -28333,7 +28331,6 @@
             "in": "body",
             "name": "body",
             "description": "Action parameters",
-            "required": true,
             "schema": {
               "type": "object",
               "properties": {
diff --git a/test/Microsoft.OpenAPI.OData.Reader.Tests/Resources/TripService.OpenApi.V2.yaml b/test/Microsoft.OpenAPI.OData.Reader.Tests/Resources/TripService.OpenApi.V2.yaml
index d36ed3de..2fae115d 100644
--- a/test/Microsoft.OpenAPI.OData.Reader.Tests/Resources/TripService.OpenApi.V2.yaml
+++ b/test/Microsoft.OpenAPI.OData.Reader.Tests/Resources/TripService.OpenApi.V2.yaml
@@ -7362,7 +7362,6 @@ paths:
         - in: body
           name: body
           description: Action parameters
-          required: true
           schema:
             type: object
             properties:
@@ -10613,7 +10612,6 @@ paths:
         - in: body
           name: body
           description: Action parameters
-          required: true
           schema:
             type: object
             properties:
@@ -19205,7 +19203,6 @@ paths:
         - in: body
           name: body
           description: Action parameters
-          required: true
           schema:
             type: object
             properties:
diff --git a/test/Microsoft.OpenAPI.OData.Reader.Tests/Resources/TripService.OpenApi.json b/test/Microsoft.OpenAPI.OData.Reader.Tests/Resources/TripService.OpenApi.json
index 1e3f588e..60e8e250 100644
--- a/test/Microsoft.OpenAPI.OData.Reader.Tests/Resources/TripService.OpenApi.json
+++ b/test/Microsoft.OpenAPI.OData.Reader.Tests/Resources/TripService.OpenApi.json
@@ -12080,8 +12080,7 @@
                 }
               }
             }
-          },
-          "required": true
+          }
         },
         "responses": {
           "204": {
@@ -17516,8 +17515,7 @@
                 }
               }
             }
-          },
-          "required": true
+          }
         },
         "responses": {
           "204": {
@@ -31640,8 +31638,7 @@
                 }
               }
             }
-          },
-          "required": true
+          }
         },
         "responses": {
           "204": {
diff --git a/test/Microsoft.OpenAPI.OData.Reader.Tests/Resources/TripService.OpenApi.yaml b/test/Microsoft.OpenAPI.OData.Reader.Tests/Resources/TripService.OpenApi.yaml
index 4d17cc15..42c1086a 100644
--- a/test/Microsoft.OpenAPI.OData.Reader.Tests/Resources/TripService.OpenApi.yaml
+++ b/test/Microsoft.OpenAPI.OData.Reader.Tests/Resources/TripService.OpenApi.yaml
@@ -8095,7 +8095,6 @@ paths:
                     - $ref: '#/components/schemas/Microsoft.OData.Service.Sample.TrippinInMemory.Models.Person'
                     - type: object
                       nullable: true
-        required: true
       responses:
         '204':
           description: Success
@@ -11734,7 +11733,6 @@ paths:
                     - $ref: '#/components/schemas/Microsoft.OData.Service.Sample.TrippinInMemory.Models.Person'
                     - type: object
                       nullable: true
-        required: true
       responses:
         '204':
           description: Success
@@ -21275,7 +21273,6 @@ paths:
                     - $ref: '#/components/schemas/Microsoft.OData.Service.Sample.TrippinInMemory.Models.Person'
                     - type: object
                       nullable: true
-        required: true
       responses:
         '204':
           description: Success