A child vehicle seat

A child vehicle seat (1, 101, 201, 301) comprises at least a seat portion (4, 104), a backrest (5) connected to the seat portion (4, 104), and side supports (6, 106, 206) being pivotably about pivot axes (7). Each side support (6, 106, 206) is provided with a connecting element (13) being swivelably connected to the side support (6, 106, 206) about a swivel axis (14) near a first end thereof and being movably connected to a slideable element near a second end thereof, for pivoting the side supports (6, 106, 206) away from each other when moving the slideable element (10, 104) in a direction away from a transition between the backrest (5) and the seat portion (4, 104) and vice versa. The connecting elements (13) are each movable with respect to the slideable element by means of a guiding element (15) being slidably located in a corresponding slot (12, 212), wherein first ends of the two slots (12, 212) are located closer to each other second ends of the slots (12, 212).