Image forming apparatus allowing simple replacement of intermediate transfer member and easy maintenance and handling of paper jams

An image forming apparatus comprising:

• a photosensitive unit having a photosensitive member on which electrostatic latent image is formed;
• a developing device for developing said electrostatic latent image;
• an intermediate transfer unit having an intermediate transfer member on which a toner image developed by said developing device is transferred;
• a sheet supplying means for supplying a sheet one by one;
• an transferring means for transferring the toner image supported on the intermediate transfer member onto a sheet material;
• a first frame on which said transferring means is provided;
• and
• a second frame on which said photosensitive unit and said intermediate transfer unit are detachably provided, respectively, said second frame being rotatably connected with said first frame so as to open a sheet transport path provided between said first frame and said second frame.