An air-fuel ratio sensor control device, connected with two-cell type air-fuel ratio sensor having electromotive force and oxygen pump cells with first to third two-cell terminals or a one-cell type air-fuel ratio sensor having a single cell with first and second one-cell terminals, includes: first to third connection terminals for connecting the one-cell or two-cell type air-fuel ratio sensor; a control circuit that is switchable between a two-cell circuit configuration for controlling the two-cell type air-fuel ratio sensor through the first to third connection terminals and a one-cell circuit configuration for controlling the one-cell type air-fuel ratio sensor through the first and second connection terminals; and a control unit that sets a circuit configuration of the control circuit to the one-cell or two-cell circuit configuration.