Abstract: The invention is directed to an adapter plate (1) for interconnecting of a device with an airplane structure. The adapter plate (1) comprises a central beam (2) area extending in a mounted position across at least two longitudinal and/or lateral floor beams (5) of a fuselage of an airplane and at least two stubs (3) arranged at an angle to the central beam area (2) in the general direction of the floor beams. The adapter plate (1) comprises fastening means to interconnect the adapter plate (2) to the floor beams (5) whereby the stubs comprise at least one channel (8) to receive an existing seat track (7) mounted on a floor beam (5).