A space adjustment device (130, 230) and head massager, the space adjustment device (130, 230) comprising a housing assembly and a drive mechanism, and being used to adjust the space between a first connecting part (110, 210, 310, 410) and a second connecting part (120, 220, 320, 420) of the head massager the drive mechanism comprises an adjustment turning knob (131, 231, 431) disposed at the outer side of the housing assembly, and a first drive pin (232, 441) one end of the first drive pin (232, 441) drives the first connecting part (110, 210, 310, 410) a first helical groove (134, 234, 4341) is disposed at the inner side of the adjustment turning knob (131, 231, 431) a first stopper guide groove (136, 236, 4351) is disposed on the housing assembly the other end of the first drive pin (232, 441) passes through the first stopper guide groove (136, 236, 4351) and is inserted into the first helical groove (134, 234, 4341). When the adjustment turning knob (131, 231, 431) is rotated, the first helical groove (134, 234, 4341) drives the first drive pin (232, 441) to move within the first stopper guide groove (136, 236, 4351), and converts the rotational movement of the adjustment turning knob (131, 231, 431) into the horizontal movement of the first drive pin (232, 441), so that the first connecting part (110, 210, 310, 410) is driven to move relative to the housing assembly, and the space between the first connecting part (110, 210, 310, 410) and the second connecting part (120, 220, 320, 420) can be adjusted. The space adjustment device (130, 230) is structurally simple and easy to operate, achieving easy and stepless adjustment.Linvention concerne un dispositif dajustement despace (130, 230) et un dispositif de massage de tête, le dispositif dajustement despace (130, 230) comprenant un ensemble boîtier et un mécanisme dentraînement, et étant utilisé pour ajuster lespace entre une première partie de liaison (110, 210, 310, 410) et une seconde partie de liaison (120, 2
