To provide a solitary foramen endoscopic surgical port for easy mounting and fixing to abdominal cavity in a simple structure, which is difficult to be out of alignment and come away, and prevents air leakage from the abdominal cavity.

A solitary foramen endoscopic surgical port includes: an outer tubular member 1 where an opening or a notch is formed at the lower end; an inner tubular member 3 capable of engaging with the outer tubular member 1; an elastic member 5 where a protrusion locking piece 6 which is formed between the outer tubular member 1 and the inner tubular member 3 by being curved to the inside toward the lower end and bent outward at the tip side, and which is formed by inserting the inner tubular member 3 to engage and protrude the protrusion locking piece 6 to the opening or the notch 7 formed at the lower end of the outer tubular member 1; and a forceps hole forming body 8 where the forceps 14 is formed at the upper part of the outer tubular member 1.