Binding apparatus, post-processing apparatus, and image forming apparatus

A binding device, a post-processing device, and an image forming apparatus are provided with: a binding member that binds a plurality of media; a first moving member that moves in the width direction of the medium; a second moving member which is supported by the first moving member, supports the binding member, and moves in a direction inclined with respect to the width direction of the media; and a contact member that is supported by the first moving member and that comes into contact with a guide member that extends in the moving direction of the first moving member. 一种装订装置、后处理装置及图像形成装置，其中，具备：装订构件，装订多张媒体；第1移动构件，沿所述媒体的宽度方向移动；第2移动构件，支承于所述第1移动构件上且支承所述装订构件，并且向相对于所述媒体的宽度方向倾斜的方向移动；及接触构件，支承于所述第1移动构件上，并与沿所述第1移动构件的移动方向延伸的引导构件接触。