Abstract: The present invention relates to a protective helmet (1) comprising: an outer shell (10); an impact absorbing liner (12), positioned inside the outer shell (10), and a comfort liner (14), positioned at an inner surface of the impact absorbing liner (12), so as to be in contact with the user's head during the use of the protective helmet (1). The comfort liner (14) comprises at least one cheek pad (16) including a padding layer (18) and a pad back plate (20). The at least one cheek pad (16) is coupled to the impact absorbing liner (12) by means of magnetic coupling means (22, 24) provided at the interface surface (P) between the pad back plate (20) and the impact absorbing liner (12). The magnetic coupling means comprise at least one projection (22), provided with a first magnetic element (26), designed to be inserted inside at least one recessed seat (24) in proximity of which a second magnetic element (28) is arranged.