A 51-year-old woman presented with a one-year history of feeling of incomplete defecation and vaginal bulging during defecation. She did not experience evacuation difficulty but relieved the residual stool sensation by repeatedly straining while pressing the vaginal bulge with her finger to evacuate stool trapped in the rectocele. Digital rectal examination revealed a large, deep rectocele on the anterior rectal wall. Defecography showed a 2.1 cm rectocele with trapping of pseudo-stool at the end of straining. Vaginal digitation effectively assisted complete evacuation and resolved the residual feeling. The patient underwent anterior levatorplasty via a transperineal approach. Seven months after surgery, defecography confirmed disappearance of the rectocele, complete evacuation of pseudo-stool, and resolution of symptoms. The feeling of incomplete defecation is a common symptom of defecation disorders, classified as structural or functional and diagnosed by defecography. Structural defecation disorders, including rectocele and rectal intussusception, may require surgical treatment; however, the degree of symptom improvement varies. Therefore, it is necessary to carefully evaluate the extent to which structural changes contribute to symptom manifestation. It is important to provide thorough explanations tailored to each patient’s condition so that patients can ultimately select and decide on their treatment options.