A hidden handle module is adapted to a tray accommodated in a chassis. The hidden handle module includes a shaft, a handle, and first and second elastic components. The shaft is pivoted on the tray and interfered with the chassis to stop the tray moving out of the chassis. The handle is pivoted on the shaft and stopped in the tray by a stopping portion of the tray to limit the position of the shaft. The first elastic component is disposed in the tray and stops the handle moving away from the stopping portion. The second elastic portion is connected between the shaft and the tray. When the handle resists elastic force of the first elastic component and moves away from the stopping portion, the handle protrudes out of the tray by elastic force of the second elastic component, and the shaft rotates to be released by the chassis.