The transversus abdominis plane (TAP) block is a regional anesthetic technique for post operative pain control after abdominal surgical procedures. Its effectiveness in children undergoing laparoscopic appendectomy has not been demonstrated. The investigators evaluate its analgesic efficacy over the first 24 post operative hours.

Inclusion Criteria:

• Patient hospitalized in surgery and infantile anesthesia unit or admitted in emergencies for an laparoscopic appendectomy surgery.
• Patient whose general state corresponds to the classification of the American Society of Anesthesiologists (ASA) I to II
• Patient member in a national insurance scheme

Exclusion Criteria:

• Patient with drilled appendicitis or peritonitis
• Patient with a contraindication to local anesthesics
• Patient with a contraindication to TAP block
• Patient with allergies or known hypersensitivity to curare