A basket is detachably mounted on a first mount of a carrier for allowing an infant car seat to be mounted on the carrier. The first mount has a first mounting slot. The basket includes a basket body and a mounting structure. The mounting structure is connected to a side of the basket body. The mounting structure has a body portion, an inserting portion and a mounting portion. The body portion is connected between the mounting portion and the inserting portion. The infant car seat is suspended on a storage space of the basket body when the inserting portion is inserted into the first mounting slot and the infant car seat is mounted on the mounting portion.