A valve device comprising: at least one valve having a switch portion and adapted to be opened and closed by the switch portion being operated; and a control device adapted to control the valve without being supplied with electricity; wherein the control device includes at least one rotatable control cam having an outer periphery with a concave and convex shape, and a driving device adapted to rotate the control cam only in a first rotational direction, out of the first rotational direction and a second rotational direction opposite from the first rotational direction, by being supplied with a pressurized medium, the valve is placed such that the switch portion comes in contact with the outer peripheral portion of the control cam, in order that the valve is opened and closed by the control cam being rotated, the driving device includes a movable member adapted to perform reciprocating motion by being supplied with the pressurized medium, a conversion transmission portion adapted to convert the reciprocating motion of the movable member into rotational motion and to transmit the rotational motion to the control cam, characterised in that the conversion transmission portion includes a rack secured to the movable member, a pinion adapted to rotate by engaging with the rack, and a clutch adapted to transmit, to the control cam, only a rotational torque in the first rotational torque, out of rotational torques of the pinion, wherein the pinion is adapted to rotate in the first rotational direction when the movable member performs forward motion, and the driving device includes a drag member adapted to apply a drag force to the movable member, when the movable member performs the forward motion. at least one valve having a switch portion and adapted to be opened and closed by the switch portion being operated; and a control device adapted to control the valve without being supplied with electricity; wherein the control device includes at least one rotatable control cam having an outer periphery with a concave and convex shape, and a driving device adapted to rotate the control cam only in a first rotational direction, out of the first rotational direction and a second rotational direction opposite from the first rotational direction, by being supplied with a pressurized medium, the valve is placed such that the switch portion comes in contact with the outer peripheral portion of the control cam, in order that the valve is opened and closed by the control cam being rotated, the driving device includes a movable member adapted to perform reciprocating motion by being supplied with the pressurized medium, a conversion transmission portion adapted to convert the reciprocating motion of the movable member into rotational motion and to transmit the rotational motion to the control cam, characterised in that the conversion transmission portion includes a rack secured to the movable member, a pinion adapted to rotate by engaging with the rack, and a clutch adapted to transmit, to the control cam, only a rotational torque in the first rotational torque, out of rotational torques of the pinion, wherein the pinion is adapted to rotate in the first rotational direction when the movable member performs forward motion, and the driving device includes a drag member adapted to apply a drag force to the movable member, when the movable member performs the forward motion.