An ostomy appliance having a pouch 12 for receipt of waste, a pouch flange connected to the pouch 12, the pouch flange having an opening communicating with an interior of the pouch 12 and a bodyside flange 14 with an opening and a hydrocolloid layer for securing the bodyside flange 14 to a body of a user around their stoma. The bodyside flange 14 includes a location projection which is receivable in a recess 30 in a part of the pouch flange to align the opening of the pouch flange relative to the opening of the bodyside flange 14. A surface of the pouch flange which in use faces the bodyside flange 14 includes an adhesive for adhering the pouch flange to the bodyside flange 14. The recess 30 is positioned at a periphery of the pouch flange and extends outwardly away from the opening communicating with an interior of the pouch 12. The projection has a flattened portion which engages a correspondingly flattened portion of the recess 30.
