A component mounting device that mounts on a board a fitting component to be attached by a mechanical fitting or engagement to a to-be-attached part formed in the board. The component mounting device includes a mounting head which carries out a moving and mounting operation in which the fitting component is taken out from a component supply part by sucking and holding the fitting component, moved and mounted on the to-be-attached part, and pressed by a first load, and a pressing operation in which the fitting component is pressed by a second load larger than the first load, and a head control part which controls the mounting head to suck and hold a neighborhood of a central portion of an upper surface of the fitting component in the moving and mounting operation, and to press a press part corresponding to the to-be-attached part in the pressing operation.