diff --git a/src/models/PostCategory.js b/src/models/PostCategory.js
new file mode 100644
index 0000000..32f7b2d
--- /dev/null
+++ b/src/models/PostCategory.js
@@ -0,0 +1,43 @@
+const { DataTypes } = require("sequelize");
+
+module.exports = (sequelize, _DataTypes) => {
+  
+  const PostCategory = sequelize.define(
+    'PostCategory',
+    {
+      postId: {
+        type: DataTypes.INTEGER,
+        field: 'post_id',
+        primaryKey: true,
+      },
+      categoryId: {
+        type: DataTypes.INTEGER,
+        field: 'category_id',
+        primaryKey: true,
+      },
+    },
+    {
+      timestamps: false,
+      underscored: true,
+      tableName: 'posts_categories',
+    },
+  );
+
+  PostCategory.associate = (models) => {
+    models.BlogPost.belongsToMany(models.Category, {
+      as: 'categories',
+      through: PostCategory,
+      foreignKey: 'post_id',
+      otherKey: 'category_id',
+    });
+
+    models.Category.belongsToMany(models.BlogPost, {
+      as: 'blogPosts',
+      through: PostCategory,
+      foreignKey: 'category_id',
+      otherKey: 'post_id',
+    });
+  };
+  
+  return PostCategory;
+};