A shock absorber which can be easily attached and which can reduce the installation space is provided. The shock absorber in accordance with the present invention is characterized by including a front wall to receive shock, a rear wall opposing the front wall, and peripheral walls connecting peripheries of the front wall and the rear wall, and at least one attaching section to attach onto an attaching object is formed to be integral with the rear wall, and shock received by the front wall is propagated via the rear wall to the attaching object.