To make it possible to use a holding device even in a small place, by making the holding scopes of four holders variable according to the size of baggage.

The this holding device 10, two holding elements 20 and 30 are prepared, and they are superposed up and down to position four holders 26, 28, 36, and 38 at the tops of a rectangle, and at the same time, a synchronizing mechanism 40 to rotate the holding element 30 at the lower position in the reverse side synchronously, when the holding element 20 at the upper position is rotated, is provided between both holding elements 20 and 30.