Abstract: An operation arm built on one side or a plurality of sides of a hand cart provided with a wheel, includes an operation section touched by an operator, and a support extending from the operation section to the hand cart, and supporting the operation section against the hand cart, and also includes a rear inclined portion inclined from an upper end of the support toward the rear side at a predetermined angle, and a grip continuous with the rear inclined portion, extending in directions crossing the forward direction and the backward direction, an extension of the grip inclined to the front side with respect to the support and formed into a circular arc shape. By so constituting, a manual pushing force is efficiently transmitted to the hand cart and an operator can operate the operation arm in a comfortable posture.