To provide a pressure sensor in which the blocking of a pressure guide port is prevented, the bonding strength in the connection of a glass seat to a metal seat is improved, and the difference in bonding strength depending on solids is minimized.

This pressure sensor comprises a sensor chip having a diaphragm with a pressure detection part formed thereon and the glass seat bonded to the sensor chip and having a first pressure guide port for transmitting a pressure to the diaphragm to detect the pressure introduced through the first pressure guide port in the pressure detection part. This pressure sensor further comprises a cylindrical pipe having one end inserted and fixed to the first pressure guide port through a bonding material, so that the pressure is introduced from the other end of the pipe.