An automatic hair washing device includes a washing part including a cover member having a head holding space, a plurality of contacts each of which is formed of a rod-shaped member, and energization means for energizing the contacts to move toward the head holding space, wherein the energization means includes an accommodation space where a fluid is accommodated and a fluid pressure adjustment part to adjust a pressure of the fluid accommodated in the accommodation space at a predetermined level, and the fluid pressure adjustment part is configured to adjust the pressure of the fluid accommodated in the accommodation space at a pressure to energize the contacts toward the head holding space such that the contacts are in contact with the human head apply approximately constant forces to the human head even when the contacts are moved by the human head.