A damper unit which brakes the speed of movement of a moving body by using a piston damper provided with a cylinder and a piston rod which is connected to a piston inside the cylinder, is provided. The damper unit includes a case wherein the above-mentioned piston damper is disposed; a transmitting member slidably provided inside the case and transmitting an external force accompanied by the movement of the above-mentioned moving body; a link member whose one end side is attached to the above-mentioned case so as to become the rotational center, and also whose the other end side is pivotally supported by the above-mentioned transmitting member; and a connecting member connected between both ends of the link member and being in contact with or connected to either the piston rod or the cylinder.