To provide a frame structure of mixed construction type which involves a connected element connectable to a frame element consisting of different materials by improving a conventional frame structure.

At least one connected element 5 consists of at least two tubular hollow bodies 10, 11 constituted of different materials and combined in a telescopic form each other. Both hollow bodies 10, 11 which are deformed under high pressure among connected elements 5 involve cut parts of different length when viewed from the longitudinal direction of respective connected parts in the areas of connected parts 7, 8, and 9. One of both hollow bodies 10, 11 are connected to each other by frame elements 2, 3, 4 of the same material as the hollow body and adjacent to each other by an additional connected part 14 as well as an insertion connected part 6.