A fixture for a vehicle, which is configured so that a plurality of retaining arms inserted into and caught by a coupling hole formed in a body panel are located on an imaginary circle, and arranged in the form of a cone so as to absorb an external force, thereby being easily assembled, and which is capable of dispersing and absorbing twisting generated when an indoor handle installed using the fixture is used. In the fixture for the vehicle, even-numbered retaining arms are formed to face each other on the imaginary circle, such that an external force generated when the indoor handle is used is dispersed and absorbed regardless of an applied direction of the external force, and a separation or an escape of the fixture is prevented, and thus a noise and a safety accident are reduced.