Generally speaking, isolated pancreatic injuries are rare after abdominal blunt trauma. However, the incidence of pancreatic injuries in children has risen in recent decades. Pancreatic pseudocyst represents a typical complication after acute pancreatitis due to blunt abdominal trauma. Spontaneous rupture of pseudocysts leading to acute abdominal pain has been described, however, it rarely occurs, especially in pediatric patients. We report the successful non-surgical management of a ruptured pancreatic pseudocyst in a 5-year-old girl which occurred 27 days after trauma. The traumatic acute pancreatitis was due to a handlebar injury.