Pipe connecting device

Provided is a pipe connection device capable of preventing breakage of bolts for fastening a receiving port-side jig and a socket-side jig, and capable of exhibiting a high disengagement prevention function even with respect to external forces acting in multiple directions. A pipe connection device (11) for preventing pipe line structural members (1, 2) from being separated from each other is provided with: a receiving port-side jig (4) attached to the outer peripheral surface (2b) of a receiving port section (2a) of one of the pipe line structural members (2); a socket-side jig (3) that is attached to the outer peripheral surface (1b) of a socket section (1a) of the piping structural member (1) that is hermetically inserted into the other of the receiving sections (2a); and a plurality of bolts (61) and nuts (62, 63) that connect the receiving port-side jig (4) and the socket-side jig (3) in the axial direction, in which the socket-side jig (3) has: a tilting suppression section (7) that suppresses tilting w