A battery pack diagnosing apparatus for diagnosing a battery pack in which a charging and discharging switching unit is installed on a charging and discharging path between a battery cell and a pack terminal, wherein the charging and discharging switching unit comprises a charging and discharging switch and a fuse connected in series with each other in the charging and discharging path; the battery pack diagnosing apparatus further comprises: a first diagnosing path having one end connected between the battery cell and the charging and discharging switching unit and the other end connected to a common node, the first diagnosing path having a first resistor; a second diagnosing path having one end connected between the charging and discharging switch and the fuse and the other end connected to the common node, the second diagnosing path having a second resistor; a third diagnosing path having one end connected between the charging and discharging switching unit and the pack terminal and the other end connected to the common node, the third diagnosing path having a third resistor; an integrated diagnosing path having one end connected to the common node and the other end connected to the ground, the integrated diagnosing path having a diagnosis switching unit and a diagnosis resistor connected in series with each other; a voltage measuring unit configured to measure a diagnosis voltage at a diagnosis node between the diagnosis switching unit and the diagnosis resistor; and a control unit configured to turn on and off the diagnosis switching unit and determine whether the charging and discharging switching unit is abnormal based on the diagnosis voltage measured by the voltage measuring unit. the charging and discharging switching unit comprises a charging and discharging switch and a fuse connected in series with each other in the charging and discharging path; the battery pack diagnosing apparatus further comprises: a first diagnosing path having one end connected between the battery cell and the charging and discharging switching unit and the other end connected to a common node, the first diagnosing path having a first resistor; a second diagnosing path having one end connected between the charging and discharging switch and the fuse and the other end connected to the common node, the second diagnosing path having a second resistor; a third diagnosing path having one end connected between the charging and discharging switching unit and the pack terminal and the other end connected to the common node, the third diagnosing path having a third resistor; an integrated diagnosing path having one end connected to the common node and the other end connected to the ground, the integrated diagnosing path having a diagnosis switching unit and a diagnosis resistor connected in series with each other; a voltage measuring unit configured to measure a diagnosis voltage at a diagnosis node between the diagnosis switching unit and the diagnosis resistor; and a control unit configured to turn on and off the diagnosis switching unit and determine whether the charging and discharging switching unit is abnormal based on the diagnosis voltage measured by the voltage measuring unit. a first diagnosing path having one end connected between the battery cell and the charging and discharging switching unit and the other end connected to a common node, the first diagnosing path having a first resistor; a second diagnosing path having one end connected between the charging and discharging switch and the fuse and the other end connected to the common node, the second diagnosing path having a second resistor; a third diagnosing path having one end connected between the charging and discharging switching unit and the pack terminal and the other end connected to the common node, the third diagnosing path having a third resistor; an integrated diagnosing path having one end connected to the common node and the other end connected to the ground, the integrated diagnosing path having a diagnosis switching unit and a diagnosis resistor connected in series with each other; a voltage measuring unit configured to measure a diagnosis voltage at a diagnosis node between the diagnosis switching unit and the diagnosis resistor; and a control unit configured to turn on and off the diagnosis switching unit and determine whether the charging and discharging switching unit is abnormal based on the diagnosis voltage measured by the voltage measuring unit.