A head massager includes a helmet (10) having a first parallel hoop (11) and a second parallel hoop (12) connected to each other for forming a ring surrounding the user's head. The helmet (10) has a first meridian hoop (21) and a second meridian hoop (22) connected to each other to form an arc structure and hang the head massager on user's head. The distance adjustment devices (3) are provided to connect the first parallel hoop (11), the second parallel hoop (12), the first meridian hoop (21), and the second meridian hoop (22) together for adjusting the size of the helmet (10) to provide a comfortable fit to user's head.
