Child seat to be used in vehicles

The invention relates to a child seat to be used in vehicles, particularly in cars, the child seat comprising a basin-like inner part (3) for a baby, a body (2), and fixing means for attaching the basin-like inner part detachably to the body (2), which body (2) is designed as a safety seat for a child bigger than a baby and comprising a seat part (25) and a backrest (26) with a neck-head support (27) for the child at the upper end. In order for the child seat to be simple with respect to its structure and use but still a safe and comfortable transport means for a baby or alternatively a child much bigger than a baby, the body (2) and the basin-like inner part (3) comprise quick-fixing means (13 to 18) for locking the basin-like inner part (3) to a resting position, or alternatively to a sitting position in which it is more upright than in the resting position, and the body (2) comprises adjusting means (13) for adjusting the height of the neck-head support (27).