A device for anastomosis of a tubular structure comprises first and second hollow members having a rigid part and an elastic part, and a connection member for interlocking the first and second members. The elastic parts are essentially circular rings, and are made of a polymeric, a biocompatible and/or biodegradable material. The rigid parts have an outer surface that is partly semi-circular in cross section, wherein the diameter at a non-connecting end is larger than or equal to the diameter at a connecting end, which ends in an edge. The first and second members are connected to each other so that a distance is formed between the elastic parts. A cavity is formed between the rigid parts and the connection member and the tubular structure, when arranged in the device.