The invention refers to a lance holder with a protector for curved lances, in particular curved oxygen lances. Besides a clamping head 5 with a fixing member 6 and a clamping 7, the lance holder 1 used for an effuse 2, in particular for an oxygen lance is also provided with a prefixing member 15 responsible for fixing in advance the effuse 2 to be guided to the lance holder 1 such that when curved, the effuse 2 can not slide and in particular can not rotate in a center clamping member 31. In addition, the lance holder 1 has an output valve 53 and a non-return valve 11 of special types, and a column springs 10 or a non-return spring is arranged in a sealed member so as to avoid influence by gas. In addition, a necessary burn-back protective device 9 is taken out of a movement path of the effuse 2 to be inserted so as to be profitably arranged by protected areas.