Abstract: A device for use in connection with fishing, comprising a container (1) adapted for dispensing of odor agents underwater, said container containing a piston device having portions (6, 7) with two different diameters, whereby one end of the portion (7) having the largest diameter is situated in a drive chamber (B) having at least one aperture (4) for inlet of water axially outside of said portion (7), while one end of the portion (6) having the smallest diameter is situated in a chamber (A) containing the odor agent, whereby the portion (7) having the largest diameter is able to force the portion (6) having the smallest diameter along the inner of the container (1), in order to force the odor agent out through at least one aperture (5) in the chamber (A) containing the odor agent, axially outside of the portion (6) having the smallest diameter, whereby means is provided for controlled dispensing of the odor agent.