An image forming apparatus has a main body having a sheet feed path configured such that a sheet is fed along the sheet feed path and an opening through which an inside and an outside of the main body communicate with each other, a sheet placing part defined in the main body and configured such that the sheet inserted, through the opening, in the main body is placed on the sheet placing part, a supply roller arranged to face the placing part and configured to feed the sheet placed on the sheet placing part in a sheet feed direction toward the sheet feed path, a frame arranged to face the sheet placing part and configured to support the supply roller, the frame having a protruded part which is protruded, in the sheet feed direction, on an opening side with respect to the supply roller, and an image forming unit provided inside the main body and configured to form an image on the sheet, and the protruding part has an inclined surface facing the sheet placing part and inclined such that a distance between the inclined surface and the sheet placing part becomes gradually smaller toward the supply roller.