The present invention discloses a multifunctional seat for automobile comprising a base, a front wall extended from a front end of the base, a back wall extended from a back end of the base and side walls extended from side ends of the base, wherein a recessed space is formed and enclosed together by the base, the front wall, the back wall and the side walls and the multifunctional seat for automobile further comprises a cushion arranged in the recessed space for sitting of an infant, and a filler detachably arranged on the cushion for reducing depth of the recessed space for ease of crouching of a pet. By providing the filler, the seat for automobile can be used for carrying the pet after the service life for the seat for infant usage is due, whereby improving the utilization rate of the seat for automobile.
