A surgical device configured to apply energy to a biological tissue as a treatment target, and treat the biological tissue, includes: first and second jaws relatively openable/closable to each other to enable holding the biological tissue including the treatment target and its surrounding tissue a pair of first holding sections provided respectively on inner sides of outer edges of the first and second jaws, and configured to hold the biological tissue an energy discharge section provided on at least one of the pair of first holding sections, and configured to give energy for a treatment to the biological tissue and a pair of second holding sections which are provided respectively between the first holding sections and the outer edges of the first and second jaws, and configured to hold the surrounding tissue of the biological tissue while bending the surrounding tissue with respect to the biological tissue.
