Abstract: A complex chair device includes a first chair and a second chair telescoped in the first chair. The seat of the first chair has a central receiving hole in which the seat of the first chair is fitted. A plurality of notches are formed in the peripheral edge of the central receiving hole. An inwardly extending flange is formed on the wall which defines the central receiving hole. Each of the legs of the second chair has a plurality of positioning notches formed along its longitudinal axis. A part of each of the legs of the second chair engages one of the notches of the seat of the first chair so that the second chair can be securely connected to the first chair by means of moving the second chair relative to the first chair and by means of rotating the second chair about its central axis when the inwardly extending flange of the first chair is aligned with and received in the positioning notches which are spaced from the seat of the second chair at the same distance.