To reduce abrasion of a sliding part of a carriage which contacts with a guide part and slides for a long time.

A mobile device includes: a movable body which reciprocates; a guide part which contacts with a sliding part of the movable body through a lubricant and guides movement of the movable body; and guiding means for guiding the lubricant applied to the guide part in a direction from the outer side of a slide area of the guide part which contacts with the sliding part toward the inner side as the movable body is moved.