Provided is a component placement machine including a rail (102) which extends along an X axis and slidably guides a head (101) along the X axis; an X beam (103) which has a bar shape, extends along the X axis, and has one side which is in a direction of a Y axis and on which the rail (102) is installed; and a Y beam (104) which extends along the Y axis and slidably guides the X beam (103) along the Y axis, and further including a reinforcement member (105) which acts against bending caused by difference in thermal expansion between the rail (102) and the X beam (103), is made of carbon fiber reinforced plastic, and is fastened, with first fasteners at three or more positions arranged along the X axis, to another side of the X beam (103) in the direction of the Y axis.