The utility model relates to the technical field of pen containers, in particular to a telescopic pen container which comprises a base frame, two side frames, a transmission mechanism and a limiting mechanism, a pen groove is defined by the base frame and the side frames, the two side frames are arranged on the two sides of the base frame respectively and connected with the base frame in a sliding mode, the transmission mechanism is arranged on the base frame, and the limiting mechanism is arranged on the transmission mechanism. The transmission mechanism comprises a rotating rod and linkage rods, the middle of the rotating rod is rotationally connected with the base frame, the number of the linkage rods is two, one end of each linkage rod is rotationally connected with the corresponding side frame, the other end of each linkage rod is rotationally connected with the two ends of the rotating rod, and the two ends of the rotating rod are rotationally connected with the base frame. The limiting mechanism is installed on the base frame and used for being connected with the rotating rod in a clamped mode. According to the telescopic pen container, the side frame is in sliding connection with the base frame, the rotating rod of the transmission mechanism is in rotating connection with the base frame, and the linkage rod is in rotating connection with the side frame, so that the linkage rod is driven by rotating the rotating rod to pull the side frame to slide relative to the base frame, and the space occupied by the base frame and the side frame and the size of the pen groove defined by the base frame and the side frame are adjusted; therefore, the size of the telescopic pen container and the number of stored pens are accurately controlled, and the purpose of fully utilizing the space and resources of the telescopic pen container is achieved.