Apparatus for the inspection of food product samples , in particular packaged raw fish products , comprising: - a box-like frame which delimits an inspection chamber ; - feed means configured to feed the samples to be inspected into said chamber ; - removal means configured to remove the inspected samples from said chamber ; - a transparent support plane , disposed in said inspection chamber and aligned with said feed and removal means and configured to support at least one sample ; - at least two light sources disposed on opposite sides of the plane and each configured to emit a beam of light toward said at least one sample supported on said plane ; - at least two visual inspection devices disposed on opposite sides of said plane , each configured to cooperate with one of said light sources in an opposite position to acquire a backlit image of the sample ; - a processing unit connected to said visual inspection devices and configured to alternatively activate or deactivate said visual inspection devices and said light source cooperating reciprocally, and process the images acquired; - a display device configured to display said images acquired, characterized in that it comprises: - opaque reference elements provided on said plane , able to be acquired by said visual inspection devices together with said backlit images of said food product , wherein said processing unit is configured to generate an overlapping image of said first image and said second image according to said acquired reference elements. - a box-like frame which delimits an inspection chamber ; - feed means configured to feed the samples to be inspected into said chamber ; - removal means configured to remove the inspected samples from said chamber ; - a transparent support plane , disposed in said inspection chamber and aligned with said feed and removal means and configured to support at least one sample ; - at least two light sources disposed on opposite sides of the plane and each configured to emit a beam of light toward said at least one sample supported on said plane ; - at least two visual inspection devices disposed on opposite sides of said plane , each configured to cooperate with one of said light sources in an opposite position to acquire a backlit image of the sample ; - a processing unit connected to said visual inspection devices and configured to alternatively activate or deactivate said visual inspection devices and said light source cooperating reciprocally, and process the images acquired; - a display device configured to display said images acquired, characterized in that it comprises: - opaque reference elements provided on said plane , able to be acquired by said visual inspection devices together with said backlit images of said food product , wherein said processing unit is configured to generate an overlapping image of said first image and said second image according to said acquired reference elements. - opaque reference elements provided on said plane , able to be acquired by said visual inspection devices together with said backlit images of said food product , wherein said processing unit is configured to generate an overlapping image of said first image and said second image according to said acquired reference elements. <EOS>