The applicator for applying a hair product comprises a base (12) and first group of fixed spikes (14) protruding relative to the base. The applicator further comprises a second group of spikes (16) separate from the spikes (14) of the first group and translatably movable relative to the base between at least one extended position protruding relative to said base on the side of the spikes (14) of the first group, and a retracted position.