diff --git a/modules/gapi/include/opencv2/gapi/cpu/gcpukernel.hpp b/modules/gapi/include/opencv2/gapi/cpu/gcpukernel.hpp
index 3de2c644995f..009c19688bf9 100644
--- a/modules/gapi/include/opencv2/gapi/cpu/gcpukernel.hpp
+++ b/modules/gapi/include/opencv2/gapi/cpu/gcpukernel.hpp
@@ -496,7 +496,7 @@ class GCPUStKernelImpl: public cv::detail::KernelTag
 #define GAPI_OCV_KERNEL_ST(Name, API, State)                   \
     struct Name: public cv::GCPUStKernelImpl<Name, API, State> \
 
-
+/// @private
 class gapi::cpu::GOCVFunctor : public gapi::GFunctor
 {
 public:
diff --git a/modules/gapi/include/opencv2/gapi/gkernel.hpp b/modules/gapi/include/opencv2/gapi/gkernel.hpp
index f70e50253d0c..cfac552bfee0 100644
--- a/modules/gapi/include/opencv2/gapi/gkernel.hpp
+++ b/modules/gapi/include/opencv2/gapi/gkernel.hpp
@@ -372,6 +372,7 @@ namespace gapi
 {
     // Prework: model "Device" API before it gets to G-API headers.
     // FIXME: Don't mix with internal Backends class!
+    /// @private
     class GAPI_EXPORTS GBackend
     {
     public:
@@ -412,6 +413,7 @@ namespace std
 
 namespace cv {
 namespace gapi {
+    /// @private
     class GFunctor
     {
     public:
diff --git a/modules/gapi/include/opencv2/gapi/infer.hpp b/modules/gapi/include/opencv2/gapi/infer.hpp
index 6e71f59df9bf..dbef5ca56e47 100644
--- a/modules/gapi/include/opencv2/gapi/infer.hpp
+++ b/modules/gapi/include/opencv2/gapi/infer.hpp
@@ -649,6 +649,7 @@ namespace gapi {
 
 // A type-erased form of network parameters.
 // Similar to how a type-erased GKernel is represented and used.
+/// @private
 struct GAPI_EXPORTS GNetParam {
     std::string tag;     // FIXME: const?
     GBackend backend;    // Specifies the execution model
@@ -660,7 +661,7 @@ struct GAPI_EXPORTS GNetParam {
  */
 /**
  * @brief A container class for network configurations. Similar to
- * GKernelPackage.Use cv::gapi::networks() to construct this object.
+ * GKernelPackage. Use cv::gapi::networks() to construct this object.
  *
  * @sa cv::gapi::networks
  */