Abstract: A loom includes a pair of side frames configured to support a beating device and each having a beam support configured to support a warp beam; and a drive mechanism configured to rotationally drive the warp beam including a beam gear, where each of the side frames is configured by a main body frame configured to support the beating device and a let-off frame fixed to the main body frame and configured to support the beam support. The drive mechanism is attached to the main body frame.