Disclosed herein is a desk for a music expert, which is intended to improve the efficiency of the arrangement of music equipment used for various music tasks such as composition or arrangement, so that music work can be performed more comfortably. The present invention provides a desk for a music expert, the desk being configured such that a top plate (10) is supported at a predetermined height by support legs (30) and a sliding plate (20) is configured to selectively move forward and rearward in a horizontal direction under the top plate (10); wherein a keyboard (100) is seated on the sliding plate (20), and left and right sides of the sliding plate (20) are movably supported by guide rails (21); and wherein a center portion of the sliding plate (20) is supported by a center reinforcing rail (22) configured to prevent the sliding plate (20) from sagging.