To provide an apparatus for acetylene production, with which when a wet type purification is carried out in the acetylene production by a carbide method, a drain containing a harmful substance discharged from a purification apparatus can be inexpensively and safely treated without discharging the drain to the outside of maintenance.

In this apparatus for acetylene production comprising (i) an acetylene generator 10 of type to which water 1 and calcium carbide 2 are fed as raw materials to generate acetylene and from which a mixture 3 of slaked lime and water is discharged as the residue and (ii) a cleaning column 6 which is arranged at the subsequent stage of the generator and removes impurities by bringing a gas generated in the generator into contact with an aqueous solution of a hypochlorous acid compound, a drainpipe 32 which is connected to the cleaning column and in which drain discharged from the cleaning column flows is connected to the generator and the drain discharged from the cleaning column is used as a part or the whole of water to be supplied to the generator.