Rolling guide apparatus and method of manufacturing movable block of rolling guide apparatus

A rolling guide apparatus in which a movable block is supported to be movable along a guide rail through a number of rolling members, a circulation passage for guiding circulation of the rolling members is formed to the movable block, said rolling member circulation passage being composed of a loaded rolling member rolling passage in a loaded area between loaded rolling member rolling grooves formed to opposing surfaces of the movable block and the guide rail and a non-loaded return passage for returning the rolling members in the loaded area from one end of the loaded rolling member rolling passage to another one end thereof, said return passage being composed of a rolling member escape hole extending in parallel to said loaded rolling member rolling passage and a direction changing passage having inner and outer peripheral portions connecting both ends of the rolling member escape hole to both ends of the loaded rolling member rolling passage,

• said rolling guide apparatus being characterized in that at least one of said rolling member escape hole, said inner peripheral portion of the direction changing passage and a retainer extending along the loaded rolling member rolling passage is formed of a molded body and said molded body is integrally formed with a block body having high rigidity.