A sheet conveyance device includes a reversing conveyance portion and a conveyance guide member. A sheet from a sheet reversing portion travels into and out of the reversing conveyance portion to be switched back so that the conveyance direction of the sheet is switched. The conveyance guide member is provided in the reversing conveyance portion, and has a sheet conveyance face facing the bottom face of the sheet passing through the reversing conveyance portion. The sheet conveyance face has one or more curved portions curved in the up-down direction as viewed from the width direction orthogonal to the conveyance direction of the sheet, and curves the sheet along the curved portion.

This sheet feeding device includes a paper transport path, a first paper pass detection unit, a second paper pass detection unit, a transport processing mechanism, an actuation determining section, and a detection control section. The first paper pass detection unit detects that the paper passes through a first point on the paper transport path. The second paper pass detection unit detects that the paper passes through a second point on the paper transport path. The transport processing mechanism performs predetermined transportation processing on the paper traveling on the paper transport path. The actuation determining section determines whether the transport processing mechanism has been actuated. The detection control section controls the first paper pass detection unit to constantly perform detection, and, if the actuation determining section detects that transport processing mechanism has been actuated, controls the second paper pass detection unit to perform detection except for a certain time period.