Abstract: A terminal structure to be locked to a terminal locking lance which is provided in a cavity of a connector housing, includes: a box part formed in a shape of a rectangular tube, including an outer bottom plate, outer side walls, an upper plate, an inner bottom plate formed inside the outer bottom plate, and an inner side wall formed inside one of the outer side walls, the box part including a contact to be in contact with a male terminal tab adapted to be inserted into the box part; and a locking protrusion including: a locking plate extended from an end of the outer side wall so as to be in parallel with the upper plate above the upper plate and adapted to be in contact with the terminal locking lance; and a stamped-out part in contact with the upper plate.