To provide a sheet feeding device capable of precluding generation of a flaw or mark in a sheet and performing separation of sheets certainly.

A sheet stacking plate 11 is moved by an elevating/lowering mechanism 35 to the sheet feeding position in such a state that a sheet feeding cassette 10 is set in the device body, and a sheet separating member 21 is brought into pressure contact with a sheet feeding member 2 by a pressure contacting/separating mechanism 45 by generating interlocking with the elevating/lowering mechanism 35 by a link mechanism. In case feeding sheets by the sheet feeding member 2 refrains from running for a certain period of time, the sheet stacking plate 11 is moved to the standby position by the elevating/lowering mechanism 35, and the sheet separating member 21 is separated from the sheet feeding member 2 by the pressure contacting/separating mechanism 45 by generating interlocking with the elevating/lowering mechanism 35 by the link mechanism.