To provide a valve device capable of guiding a fluid from an inlet port to an exit port via a valve port, when opening a valve.

A valve element 2 is provided in an inside of a valve chest 16 of the valve, to be movable along an valve opening direction and a valve closing direction, and has a seating face 25 seating on a valve seat 15 when opening the valve, and a protruded part 26 advancing into the valve port 14 more than the seating face 25 when closing the valve. The protruded part 26 of the valve element 2 has a straightened flow guide face 27 for restraining a turbulent flow from being formed by guiding the fluid from the inlet port 12 provided in the valve element 2 to the exit port 13 via the valve port 14.