Patent ID: 7284754

Claim:
A sheet cassette comprising: a tray main body part; a tray expansion/contraction part supported by the tray main body part and configured to slide relative to the tray main body part to a cassette expanded position where the sheet cassette is in an expanded state and a cassette contracted position where the sheet cassette is in a contracted state, the tray expansion/contraction part comprising a rear end regulation member configured to be moved in a direction in which recording media stacked in the sheet cassette are fed to regulate rear ends of the recording media and a sliding guide part configured to support the rear end regulation member to freely slide and to form a moving path of the rear end regulation member; and a fall-off prevention member provided to an end part of the sliding guide part of the tray expansion/contraction part at the side of the tray main body part and configured to prevent the rear end regulation member from falling off the sliding guide part.