To provide a safety net for protecting an operator against bursting of a tire which may occur when filling the tire with air.

Meshes 3, 3, ... formed on the net are formed into such a size that work of connecting an air chuck at the distal end of a hose extended from an air filling machine with a valve of the tire can be performed upon filling the tire with air, connection strings 5, 5, ... are connected on the outer circumference or on the outside of the net, locking fixtures 6, 6, ... are attached to the tips of the connection strings 5, 5, ... and length adjusting implements 8, 8, ... capable of adjusting the length of the connection string are disposed.