The present disclosure provides a card holder, an inserting device and a terminal. The card holder is configure to install a data card, and includes a card tray, a sliding block and an elastic element. The card tray defines a card slot and a sliding groove, the card slot is configured to receive the data card, and the sliding groove is in communication with the card slot. The sliding block is capable of sliding along the sliding groove. The elastic element is coupled to the sliding block, fixed to the card tray, and configured to press the sliding block to make the sliding block abut against the data card when the elastic element is in a deformation state. The inserting device includes a card socket and the card holder. The terminal includes the card holder.