The present invention provides a method for controlling hair growth, a method for selecting or evaluating a hair growth control agent, and a hair growth suppression agent. The present invention provides a method for selecting or evaluating a hair growth control agent, including the steps of administering a test substance to a cell capable of expressing DnaJC6； measuring the expression of DnaJC6 in the cell； and evaluating the controlling effect of the test substance on hair growth based on the expression. The present invention also provides a hair growth suppression agent containing funabarasou (Cynanchum atratum) or its extract as the active ingredient.
