PURPOSE: To provide a titled device which can write and read out a welding condition with a stationary storage device as a medium by consisting the same of a storage section for the welding condition, a condition setting section for correcting the stored welding condition, and a control section for controlling an automatic arc welder in accordance with the welding condition read from the storage section.

CONSTITUTION: An ROM20 in which a welding condition is preliminarily stored is mounted in the socket 26 of a data transfer means 22, and a command for reading out data is given by a function selecting switch 28. A control section 10 consisting mainly of a CPU starts reading out the data stored in the ROM20 via the means 22 and transfers the data to a storate section 14 for the welding condition. An operator is able to handle the data stored in the section 14 similarly to the data inputted from a condition setting section 12 upon completion of the transfer. The correction, etc. of the data are thus easily accomplished.