RACK PINION TYPE POWER STEERING DEVICE

PROBLEM TO BE SOLVED: To provide a rack pinion type power steering device which can prevent air from being accumulated inside a cylinder tube without making the device large in size, and also can prevent steering feeling from being degraded. SOLUTION: Hydraulic control valves are connected to two hydraulic chambers located between both sealing mechanisms to be partitioned by a cylinder integrated with a rack 4 by way of pipelines 16 and 17 respectively, in a space between two sealing mechanisms sealing a space between the inner circumference of a cylinder tube 6 covering the rack 4 to be meshed with a pinion rotated by steering and the outer circumference of the rack 4. The respective oil chambers and the insides of the respective pipelines 16 and 17 are communicated through holes 50 formed in the circumferential wall of the cylinder tube 6. In a state that the cylinder tube 6 is fixed to the side of a car body in such a way that the axis of the rack 4 is laid along the horizontal direction, each communication hole 50 has a part to be located at the highest position K inside the cylinder tube 6 in a space between both sealing mechanisms.