PURPOSE: To provided an embroidery frame holder fitting structure of sewing machine for embroidery capable of fixing an embroidery frame holder equipped with an embroidery frame to a moving frame simply and in a short time.

CONSTITUTION: Plural position determining pins 18 for deciding the position of an embroidery frame holder 20 is installed on the top of a rear frame part 16c of a moving frame and a horizontal wedge-shaped holding part lapered toward the front is made on the under surface of a rear frame part 16c of the moving frame. At least, one pair of U-shaped cut parts 20c to be engaged with the position determining pins 18 are formed in the rear of the embroidery frame holder 20 and an engaging part 21a to be geared with a latching part is laid on the under surface of the rear of the embroidery frame holder 20. A clamp mechanism 25 comprising a spring mamber 30 to be detachably engaged with the position determining pins 18 and a change lever 28 for switching the spring member 30 from a loose state to a tight state are set at a place corresponding to the front of the U-shaped cut part 20c among the top of the rear of the embroidery frame holder 20 is installed.