A connector (100) and a communications device is disclosed. The connector includes a connector body (41) and three connecting ends disposed on the connector body. M signal interfaces (51a) inside a first connecting end (42) are in communication with M signal interfaces (51b) inside a second connecting end (43) in a one-to-one correspondence. The first connecting end is connected to a backplane connector (32) on a backplane (31). The second connecting end is connected to one end (45a) of a transmission cable (45), and the other end (45b) of the transmission cable is connected to a communications component (46) on a target board (33a). The backplane is configured to implement communication between X boards (33), and the target board is any one of X boards, where M≥1 and X≥1. A third connecting end (44) is configured to secure the connector body to the target board.