An electric storage device management apparatus (3, 9) comprising: a controller configured to: perform a voltage drop determination process to determine a voltage drop value (VD2, VDP) of a conductive member (B3B, DKB) that connects electric storage devices (C1-C4); and perform a voltage between terminals determination process to determine a voltage value (VR2, VR4) between terminals of one of the electric storage devices after the voltage drop determination process; a voltage detector connected to the electric storage devices (C1-C4) via the conductive member (B3B, DKB) and configured to detect a voltage value (VB2, VB4) of a current path including one of the electric storage devices (C1-C4) and the conductive member (B3B, DKB); and a current detector configured to detect a current value of a current flowing through the conductive member (B3B, DKB), wherein characterized in that the controller is further configured to: determine the voltage drop value (VD2, VDP) of the conductive member (B3B, DKB) based on the resistance value of the conductive member (B3B, DKB) and the current value of the current flowing though the conductive member (B3B, DKB) in the voltage drop determination process; and determine the voltage value (VR2, VR4) between terminals of the electric storage devices based on the voltage value (VB2, VB4) of the current path and the voltage drop value (VD2, VDP) of the conductive member (B3B, DKB) in the voltage between terminals determination process. a controller configured to: perform a voltage drop determination process to determine a voltage drop value (VD2, VDP) of a conductive member (B3B, DKB) that connects electric storage devices (C1-C4); and perform a voltage between terminals determination process to determine a voltage value (VR2, VR4) between terminals of one of the electric storage devices after the voltage drop determination process; perform a voltage drop determination process to determine a voltage drop value (VD2, VDP) of a conductive member (B3B, DKB) that connects electric storage devices (C1-C4); and perform a voltage between terminals determination process to determine a voltage value (VR2, VR4) between terminals of one of the electric storage devices after the voltage drop determination process; a voltage detector connected to the electric storage devices (C1-C4) via the conductive member (B3B, DKB) and configured to detect a voltage value (VB2, VB4) of a current path including one of the electric storage devices (C1-C4) and the conductive member (B3B, DKB); and a current detector configured to detect a current value of a current flowing through the conductive member (B3B, DKB), wherein characterized in that the controller is further configured to: determine the voltage drop value (VD2, VDP) of the conductive member (B3B, DKB) based on the resistance value of the conductive member (B3B, DKB) and the current value of the current flowing though the conductive member (B3B, DKB) in the voltage drop determination process; and determine the voltage value (VR2, VR4) between terminals of the electric storage devices based on the voltage value (VB2, VB4) of the current path and the voltage drop value (VD2, VDP) of the conductive member (B3B, DKB) in the voltage between terminals determination process. determine the voltage drop value (VD2, VDP) of the conductive member (B3B, DKB) based on the resistance value of the conductive member (B3B, DKB) and the current value of the current flowing though the conductive member (B3B, DKB) in the voltage drop determination process; and determine the voltage value (VR2, VR4) between terminals of the electric storage devices based on the voltage value (VB2, VB4) of the current path and the voltage drop value (VD2, VDP) of the conductive member (B3B, DKB) in the voltage between terminals determination process.