Ascaris lumbricoides is an infestation that affects approximately one-seventh of the world's population. Ascaris lumbricoides is a common inhabitant of the intestines of people with low-socioeconomic incomes, especially in underdeveloped countries of the world. Ascaris lumbricoides infestation is more prone to infestation with serious complications such as intestinal obstruction, volvulus, intussusception, and intestinal necrosis at higher rates in children than in adults. The authors present here two cases of small bowel obstruction caused by massive Ascaris lumbricoides that were admitted to the pediatric surgery service after completing a clinical and physical examination, and we operated after rehydration. Both underwent surgical resection with an end-to-end anastomosis. The patient was discharged uneventfully with a plan for de-worming treatment in 6 weeks. Ascariasis is a round intestinal worm infestation transmitted by fecal or oral contamination. Eating and excreting ascaris eggs lead to ascariasis and excrete human feces, which contaminate foods, soil, and/or water in unsanitary environments. In contrast, in the first case of this study, the diagnosis was made by ultrasound and erect abdominal radiography, and, in the second case, an abdominal ultrasound result was equivocal and required an abdominal computed tomography scan for confirmation. Treatment of small bowel obstruction by roundworms is usually surgical, but in the absence of signs of peritonitis, medical management can give effective results, even in the case of total obstruction. The type of surgery undertaken is determined by the results of the laparotomy. If the bowel was found to be intact and the obstruction was at the ileum level, milking worms to the cecum can be done with caution to avoid trauma to the bowel wall. Primary anastomosis after resection of a necrotic bowel segment and removal of the worm bolus is a suitable method for treatment of the ascariasis obstruction.