Disclosed is a motion guide device that is equipped with a lubricant channel capable of coping with both of grease lubrication and oil lubrication. The motion guide device includes track rail (1) and moving block (2) slidably mounted via roller (3) as a rolling element onto the track rail (1). The moving block (2) at its both ends of moving direction is provided with turnaround path (6) for circulation of the roller (3) and further fitted with end plate (32) equipped with lubricant channel (38) for feeding of a lubricant to the roller (3). In the oil lubrication using a lubricating oil as thelubricant, the end plate (32) is fitted with lubricant channel part (39) to thereby narrow the lubricant channel (38). On the other hand, in the grease lubrication using a grease as the lubricant, the end plate (32) is not fitted with the lubricant channel part (39) to thereby render the lubricant channel (38) wider than in the oil lubrication.