A wound therapy device (2), comprising - an outer part (4) comprising an inner part facing surface (6) provided with an inner part facing opening (8), and a first connection channel (10) to establish fluid communication between said inner part facing opening (8) and a connecter opening (12) adapted to be connected to an external device (14). The device further comprises - an inner part (16) comprising an outer part facing surface (18) provided with an outer part facing opening (20), and a second connection channel (22) to establish fluid communication between said outer part facing opening (18) and an opening (24) adapted to be arranged in connection with a wound (26), wherein said inner part (16) is adapted to be arranged under a wound cover film (28) in relation to the wound (26), and - a locking means (32) adapted to attach and lock said outer part (4) to said inner part (16), having said wound cover film (28) arranged between said parts, and such that said inner part facing opening (6) and outer part facing opening (18) are positioned to essentially correspond to each other. The invention also comprises a wound therapy arrangement (50) comprising the wound therapy device, a wound filler, an external device, a wound cover film, and tubing connections (15). In addition a method of using the wound therapy arrangement is disclosed.
