A sheet supplying device is provided with a separation roller having an outer circumferential surface contacting at least a part of the sheets in a stacked state, and a pad located to face the outer circumferential surface of the separation roller. The sheet supplying device is further provided with a holder that holds the pad and is movable relative to the separation roller, and a pressing mechanism that presses the holder in a direction in which the pad held by the holder approaches the separation roller. The pad contacts a first surface of a sheet being fed by rotation of the separation roller, and the first surface of the sheet is opposite to a second surface of the sheet contacting the outer circumferential surface of the separation roller. The holder has a recessed portion formed on an upstream side of a pressurization point at which the sheet being fed is nipped between the separation roller and the pad. Space is formed by the recessed portion and a surface of the pad facing the holder.