Mechanical intestinal obstruction during pregnancy is an extremely rare and dangerous complication. It refers mostly to small intestine. The cause of occurring this complication are previous operations and inflammations and one of their results: adhesions. The classical triade of symptoms - stomachaches, vomiting, stop of fases and stool - are to seen very rarely in there pure form during pregnancy. These symptoms while occurring individually often accompany pregnancy. The diagnosis of the mechanical obstruction, independently on the size of pregnancy and the cause of affection, authorize to operational treatment. Opening of the abdominal cavity should be done by inferior medial section. The purpose of this operation is removing the cause of obstruction, decompression of the intestine, restitution of passage and preventing renewal of obstruction. The decision of simultaneous cesarean section must make allowances for the state of fetus, neonatal treatment facilities, sizes of the obstruction and general state of the pregnant. The cause of closing down the lumen of the intestine are adhesions in 60 %, and more than a half of obstruction cases refers to the 3rd trimester of pregnancy. The death rate of mothers is 10 - 20 % and of fetus 24 - 31 %. A favourable prognosis for the mother of the child can be assured only by early diagnosis and early operational treatment.