Patent ID: 7162965

Claim:
A sewing machine comprising: a presser foot that presses a workpiece cloth when in lowered state; a presser foot lifting lever operated to lift the presser foot; a thread tension mechanism provided with a thread tension regulator capable of adjusting a thread tension of a needle thread, the thread tension regulator being opened by a lifting operation of the presser foot lifting lever; a thread guide groove that guides the needle thread drawn from a thread supplying source at least to the thread tension mechanism, upon thread hooking; a detector to detect the lifting operation of the presser foot lifting lever; a covering member movable between a closed position where the covering member covers at least a part of the thread guide groove and an opened position, the covering member being moved to the closed position when the presser foot is lowered; an actuator that moves the covering member at least from the closed position to the opened position; and a controller that controls the actuator so that the covering member is moved to the opened position when the detector detects the lifting operation.