Sewing machine

A sewing machine comprising:

• a feed dog partially protruding out up and down from a throat plate to feed a workpiece;
• a sewing needle configured to perform stitch points on the workpiece by moving up and down;
• and
• a shuttle configured to capture an upper thread passed through the sewing needle below the throat plate to be entwined with a lower thread,
• wherein the feed dog includes:
• a top plate having teeth formed on an upper surface thereof, and
• a support portion to which a feed operation relative to the top plate is input, and
• wherein the top plate includes:
• an insertion hole that the sewing needle penetrates up and down,
• a pair of wall portions extending in an up-and-down direction respectively on one side and another side in a feed direction of the workpiece relative to the insertion hole on a lower surface side of the top plate,
• each wall portion on a lower thread feed port side of the shuttle of the pair of wall portions has an inner side surface on an insertion hole side inclined in a direction away from the insertion hole as approaching downward, and
• the inner side surface is separated from an inner wall of the insertion hole as approaching downward.