A swimsuit without thread sewn seams includes a front portion, a back portion and a bonding structure connecting the joint of the front portion and the back portion. The bonding structure comprises that a glue layer is disposed between said fundus material and the joint of the front portion and the back portion. The elastomer set in the bra cup, the front portion, the fundus material and the steel circle are connected by solid glue. The present invention provides a swimsuit without patchwork. The steel circle is embedded in the swimsuit to make it comfortable and beautiful.