A collet replacement mechanism for replacing a collet of a pickup tool that is configured to pick up chip components by suction using the collet comprises an attachment configured to hold the collet on a bottom surface thereof, an attachment holder disposed at a lower part of the pickup tool and configured to hold an upper part of the attachment by magnetic force, and an attachment storage unit having a guide that is configured to latch the attachment to store the attachment, the attachment being detachable from the attachment holder in a state of being latched to the guide.