Linear guide device

The life of a linear guide device which can be employed in an environment where high cleanness or oil free is required is prolonged by using a solid lubricating agent.In order to attain the object, in a linear guide device comprising a guide rail, and a movable unit consisting of: a movable block which is disposed with straddling the guide rail; and balls (rolling elements) which are enclosed in a ball circulation passage disposed in the movable block, at least ball raceway surfaces of the guide rail and the movable unit are coated with a solid lubricating agent, and the clearance between the guide rail and the movable unit is 0 or positive. Although a solid lubricating agent which is susceptible to be affected by a load is used, therefore, the life of the device can be prolonged as compared with the case where a negative clearance is employed.