PROBLEM TO BE SOLVED: To provide a buffer packing device capable of firmly fastening a slender article to a prescribed position, and surely retaining a buffer effect, efficiently storable in a packing case by minimizing a gap, enabling downsizing a case, and free from the need of a conventional buffer material.SOLUTION: A buffer packing device is such that: junctions 41, 42 and 43 joined with inner and outer packages 2 and 3 continuously or intermittently along the axial direction are provided in three places in the circumferential direction of an expansion space S surrounding the periphery of an article; the expansion space S is divided into small expansion spaces s1, s2 and s3 in the circumferential direction by the junctions in three rows; by fluid filling, the inner package 2 constituting each of the small expansion spaces extends to the inside, and the outer package 3 extends to the outside; and the small expansion spaces function as a cushioning material and at the same time, and each portion (inner sur
