Paper feeding cassette and image forming apparatus

A paper feeding cassette loadable into and unloadable from an image forming apparatus body, said paper feeding cassette comprising:

• a tray housing stacked paper media and having a bottom of an approximately rectangular shape and a sidewall provided to surround the bottom;
• and
• a trailing edge regulating member slidably disposed in a guide region placed in said bottom so as to extend along a paper feeding direction in which said paper media are fed and regulating a position of a trailing edge of said paper media in said paper feeding direction,
• said trailing edge regulating member including a base portion and an upright wall provided in said base portion on a rear side in said paper feeding direction,
• said sidewall including a rear sidewall provided on a trailing edge side of said paper media in said paper feeding direction,
• said upright wall including a first upright portion extending upright from said base portion and a second upright portion provided above said first upright portion and having a rear end face located rearwardly of a rear end face of said first upright portion, and
• when said trailing edge regulating member is located on a rearmost side in said guide region, the rear end face of said first upright portion being brought into contact with an inner face of said rear sidewall and said second upright portion being located above said rear sidewall.