Provided is a motion guide device having a lubricating path usable for both of grease lubrication and oil lubrication.The motion guide device has a raceway rail 1 and a moving block 2 mounted on the raceway rail 1 slidably via rollers 3 as rolling elements. Onto each moving-directional end of the moving block 2, an endplate 32 is attached which has a direction change path 6 formed therein for circulation of the rollers 3 and a lubricating path 38 formed therein for supplying the rollers 3 with a lubricant. In oil lubrication with use of lubricating oil as the lubricant, a lubricating path piece 39 is fit into the endplate 32 to narrow the lubricating path 38, while in grease lubrication with use of grease as the lubricant, the lubricating path piece 39 is not fit to the endplate 32 so as to widen the lubricating path 38 as compared with that for the oil lubrication.