Ultrasonic wave device

摘要

An ultrasonic wave device includes a holding member designed to be fixed to an inner surface of a bumper as a vehicle outer panel, and a body block designed to be connected with the holding member. The body block includes a head designed to be inserted in an exposing hole provided at the bumper, and at least one abutting part designed to abut on the inner surface of the bumper at a position closer to the exposing hole than a position where the holding member is fixed. The body block is biased to an outer side of the bumper by a spring force of the clamping part, which is a biasing part provided with the holding member.