Speaker for vehicle and mounting structure of the speaker

The present invention relates to a speaker for a vehicle and an installation structure therefor, and it is an object of the invention to enhance the speaker installation rigidity without impairing the acoustic characteristic of the speaker. The speaker installation structure comprises a speaker unit for holding a speaker body and having a plurality of claws and a panel member having an opening and a plurality of slits. For the installation of the speaker unit, the plurality of claws are inserted into the plurality of slits, respectively, and the speaker unit is rotated in its circumferential direction. The opening is made to be smaller than the diameter of a speaker housing and to have at least three linear portions. Each of the slits is formed outside the three linear portions and inside an outer circumference of the speaker housing.