embodiment features that the article 1 is transferred from one side top side in fig5 of the electrodeposition bath 100 to the other side bottom side in fig5 in the aqueous solution w in the electrodeposition bath 100 by a transfer means not shown the membrane electrode devices 3 3 in the above embodiment are provided at the incoming side of the bath and the membrane electrode devices 4 4 are provided at the outgoing side of the bath the above described action and effects in the second embodiment are substantially similar to those in the first embodiment however in this embodiment the current density per article is higher at the incoming side of the bath than at the outgoing side of the bath so that the excessive removal of acid can be prevented more effectively this embodiment features that a voltage regulating means 40 for regulating a voltage applied is provided between the membrane electrode devices 3 4 and the article 1 in the above described first embodiment other respects of the arrangement are similar to those in the above described first embodiment even with this arrangement the action and effects similar to those in the first embodiment are obtained and moreover the voltage applied between the respective membrane electrode devices and the article 1 can be regulated through the agency of the voltage regulating means 40 so that such an advantage can be achieved that the value of acid in the electrodeposition bath 100 can be adjusted more easily incidentally in the above embodiments the case where the electrodes constituting the second electrodes each include the tubular electrode member has been.