A sheet feed device includes a sheet storage portion, a first regulation portion, a feed portion, and a second regulation portion. The sheet storage portion is attached to an apparatus main body in a detachable manner. A sheet is stored in the sheet storage portion. The first regulation portion stands on a bottom surface of the sheet storage portion and regulates a position of the sheet in a predetermined width direction by externally abutting on a first side of the sheet in the width direction. The feed portion is provided in the apparatus main body and feeds the sheet in a feed direction perpendicular to the width direction. The second regulation portion is provided in the apparatus main body and regulates a position of the sheet by externally abutting on the first side at a downstream of the first regulation portion in the feed direction.