A sheet feed device has a tray with holding surface for holding sheets, a feed unit for feeding sheets from the tray, and a separation plate. The separation plate has an inclined surface and two or more separation portions that separate a sheet from the sheets held in the tray. At least one of the separation portions projects a first distance from the inclined surface. The separation plate also has a projection positioned on the inclined surface that projects a second distance from the inclined surface. The second distance is greater than the first distance. A first of the separation portions is positioned upstream of the particular projection in the sheet feed direction, and a second of the separation portions positioned downstream of the particular projection in the sheet feed direction.

A sheet cassette includes a bottom portion, a pair of side walls, a lift plate and an auxiliary supporting portion. The pair of side walls stand from the bottom portion. The lift plate is arranged on the bottom portion, and a sheet to be fed in a conveying direction is placed on the upper surface of the lift plate. The lift plate includes a pair of fulcrum portions arranged on an upstream side in the conveying direction and is moved to a sheet feeding position for feeding the sheet by being moved upward from a bottom position with the fulcrum portions. The auxiliary supporting portion is arranged inwardly of the pair of fulcrum portions in a sheet width direction, is arranged between the lift plate arranged at the bottom position and the bottom portion and supports the lift plate.

A sheet feed device has a tray with holding surface for holding sheets, a feed unit for feeding sheets from the tray, and a separation plate. The separation plate has an inclined surface and two or more separation portions that separate a sheet from the sheets held in the tray. At least one of the separation portions projects a first distance from the inclined surface. The separation plate also has a projection positioned on the inclined surface that projects a second distance from the inclined surface. The second distance is greater than the first distance. A first of the separation portions is positioned upstream of the particular projection in the sheet feed direction, and a second of the separation portions positioned downstream of the particular projection in the sheet feed direction.

A feeding cassette includes a hopper, a side guide, and a lift plate. The lift plate rotates with one end portion thereof serving as a rotational fulcrum, and, using a tip portion thereof, supports an under surface of the hopper from below and moves the hopper upward. The hopper includes a constricted portion for reinforcement protruding to an under side, in at least an extension portion. The constricted portion for reinforcement includes a supporting constricted portion with which the tip portion of the lift plate comes into contact when the lift plate supports the under surface of the hopper in a swingable range of the hopper. The supporting constricted portion includes a first constricted portion that is a path including a component in a feeding direction, and at least a part of the first constricted portion is provided in the extension portion. The lift plate supports the first constricted portion.