A barrier net mounting structure may include a roof bracket provided on a head lining, and a hook provided on a lateral portion of a barrier net and inserted into the roof bracket, wherein the hook includes a rod having one end provided on the lateral portion of the barrier net, and the other end inserted into the roof bracket, and a locking portion and a stopper portion which may be provided on the other end of the rod in a spaced state therebetween, wherein one end of the locking portion may be locked to an inner surface of the roof bracket, and one end of the stopper portion may be supported by an outer surface of the roof bracket.