Disclosed herein is a robot for transferring an article: a body configured to be moved while hanging on a moving rail; a holding unit configured to hold the article; a two-way sliding unit configured to be connected to the holding unit and slide the holding unit to both sides of the body; and an elevation-driving unit configured to be installed at the body and connected to the two-way sliding unit to elevate the two-way sliding unit along a height direction of the body.