Patent ID: 7171914

Claim:
A horizontal rotary hook of a sewing machine comprising: an inner rotary hook made of synthetic resin and housing a bobbin; an outer rotary hook made of synthetic resin and housing the inner rotary hook and rotated in a predetermined direction; an adsorption plate made of a magnetic material and provided on one of an outer surface of a bottom wall of the inner rotary hook and an inner surface of a bottom wall of the outer rotary hook; a magnet piece formed as a thin plate and provided in the other of the outer surface of the bottom wall of the inner rotary hook and the inner surface of the bottom wall of the outer rotary hook; and a yoke member made of a magnetic material and housing the magnet piece integrally formed with a bottom wall contacting the magnet piece and a surrounding wall surrounding an outer circumferential side of the magnet piece, the yoke member being provided on the other of the outer surface of the bottom wall of the inner rotary hook and the inner surface of the bottom wall of the outer rotary hook.