An image forming apparatus comprises a main body, a post-processing device, an objective working section, a light source and a shade member. The post-processing device is disposed freely displaceable between a retracted position at which it is received by an intra-body paper discharge section of the main body and a protruded position at which it is drawn to one side face side. The objective working section is disposed on an upstream side face of the post-processing device in the drawing direction of the post-processing device.The light source is disposed on the upstream side face of the post-processing device, and lights up the objective working section at the protruded position. The shade member is disposed on the upstream side face of the post-processing device and in the front face side from the light source, and blocks direct projection light of the light source to the front face side.