An image forming apparatus includes a main body that includes a first engagement part, a first unit configured to be removably installed in the main body, and a second unit configured to be removably installed in the main body. The first unit includes a frame, a pivot shaft formed on the frame, a grip part that is rotatable around the pivot shaft and that includes a second engagement part that is configured to engage with the first engagement part, a pivot shaft hole that is configured to receive the pivot shaft, and a user operable operation part. When the second unit is laid on the first unit, the second unit presses the operation part and causes the grip part to rotate in a first direction such that the second engagement part engages with the first engagement part.