A plate heat exchanger including a package of heat transfer plates (3), which are provided between a first plate (5) and a second plate (6), a tubular filter member, which has an inner surface and an outer surface and a component for supporting the filter member in a porthole channel (2) of the plate heat exchanger (1), characterised in that the component (20) includes a first part, which is arranged to be introduceable into the tubular filter member (15) to abutment against the inner surface of the filter member (15), and a second part (22), which is arranged to abut a surface area of one of said first and second plates (5, 6), which surface area extends around the porthole channel (2).