SWITCH DEVICE

A switch device (10) includes a switch body (11) that supports a lever operating portion (12,13), and a cylindrical fitting portion (14) through which the switch body is attached to an attached portion. The fitting portion (14) includes a plurality of elastic deformation portions (14b) elastically deformable by a clamping force of a clamping band member (15) and a pressed-bulging portion (14c) bulging from an outer surface of a tip portion of the elastic deformation portions (14b). The pressed-bulging portion (14c) is configured to locate at a contact position with the attached portion.