The invention relates to a stench trap, comprising: - a housing with at least a first and a second mutually adjacent vertical chambers, wherein the two chambers are in liquid contact with each other on the underside; - an outlet opening arranged at the top of and in a side wall of the first chamber; - a first inlet opening arranged in the upper wall of the second chamber; characterized by - a tubular insertion part which is placed sealingly and slidably in the inlet opening.