SENSOR UNIT, AND ATTACHING STRUCTURE OF SENSOR UNIT AND ATTACHMENT OBJECT

The invention provides a sensor unit easily attachable to an attachment target. [0002] A sensor unit U1 is attachable to an attachment target T so as to be partly accommodated, from the Z'-direction side, in a hole H opening out at least in the Z' direction of the attachment target T. The unit U1 includes a detection sensor 100 capable of detecting approach of a detection target from the Z-direction side, and at least one cushion 200 covering the detection sensor 100 at least partly from the Z-direction side and may be at least partly accommodated in the hole H. The at least one cushion 200 is at least partly accommodated in the hole H of the attachment target T in a state where the sensor unit U1 is attached to the attachment target T from the Z'-direction side.