To provide a table structure of an embroidery machine that helps an operator easily carry out miscellaneous types of work to a machine head and is free from trouble due to movements of an embroidery frame.

A structure of a horizontal embroidery machine table 1 on which an embroidery holder to hold an embroidery is mounted, featuring the provision of a notch 30 at the front edge of the machine table 1, mounting swingably of an auxiliary table 31 corresponding to the notch 30 and provision of a locking mechanism 36 capable of locking the auxiliary table 31 in a posture of being locked at the same height as the machine table 1.