To provide a tire chain mounting instrument enabling anyone to safely carry out troublesome mounting of a tire chain without soiling clothes in a short period of time in winter, the instrument to be manufactured at low cost.

Connecting work can be carried out not by groping but while confirming with eyes by making a vehicle run on the tire chain previously arranged by dividing it at a ratio of six to four, and carrying out the connecting work of the chain on the widest tire of a tire house. Additionally, a structure is safe and simple, and it is also possible to rationally save a necessary material with reinforced plastic and thinned out wood from forestry.