A sheet electrical resistance measuring device (10, 13) comprising: a housing having a gap for receiving a sheet therein; a sheet pulling member (100, 200) that is disposed in the housing and is configured to pull the sheet inserted into the gap; a starter (166, 266) that is disposed in the housing and that is configured to detect the sheet inserted into the gap and cause the sheet pulling member (100, 200) to start pulling the sheet; a stopper (164, 264) that is disposed in the housing and causes the sheet pulling member (100, 200) to stop pulling the sheet; and a pair of electrodes (120, 130, 290) that is disposed in the housing and is configured to measure electrical resistance of the sheet which is stopped and brought into contact with the pair of electrodes (120, 130, 290), wherein the housing includes a first housing, a second housing, and a joint section which connects end portions of the first housing and the second housing, the gap is formed between the first housing, the second housing and the joint section and extends in a direction perpendicular to the joint section so that the sheet is inserted into the gap and conveyed within the gap in a flat manner along a pulling direction of the sheet pulling member (100, 200) towards the joint section, the sheet electrical resistance measuring device (10, 13) being characterized by further comprising: a start detection sensor disposed at a position before the sheet pulling member (100, 200) in the pulling direction to detect a leading end of the sheet in the gap; and a stop detection sensor disposed at a position behind of the sheet pulling member (100, 200) in the pulling direction to detect the leading end of the sheet in the gap, wherein both the start detection sensor and the stop detection sensor do not come into contact with the sheet, and the starter (266, 166) and the stopper (264, 164) cause the pulling member (100, 200) to start pulling and stop pulling of the sheet according to detection results of the start detection sensor and the stop detection sensor, respectively. a housing having a gap for receiving a sheet therein; a sheet pulling member (100, 200) that is disposed in the housing and is configured to pull the sheet inserted into the gap; a starter (166, 266) that is disposed in the housing and that is configured to detect the sheet inserted into the gap and cause the sheet pulling member (100, 200) to start pulling the sheet; a stopper (164, 264) that is disposed in the housing and causes the sheet pulling member (100, 200) to stop pulling the sheet; and a pair of electrodes (120, 130, 290) that is disposed in the housing and is configured to measure electrical resistance of the sheet which is stopped and brought into contact with the pair of electrodes (120, 130, 290), wherein the housing includes a first housing, a second housing, and a joint section which connects end portions of the first housing and the second housing, the gap is formed between the first housing, the second housing and the joint section and extends in a direction perpendicular to the joint section so that the sheet is inserted into the gap and conveyed within the gap in a flat manner along a pulling direction of the sheet pulling member (100, 200) towards the joint section, the sheet electrical resistance measuring device (10, 13) being characterized by further comprising: a start detection sensor disposed at a position before the sheet pulling member (100, 200) in the pulling direction to detect a leading end of the sheet in the gap; and a stop detection sensor disposed at a position behind of the sheet pulling member (100, 200) in the pulling direction to detect the leading end of the sheet in the gap, wherein both the start detection sensor and the stop detection sensor do not come into contact with the sheet, and the starter (266, 166) and the stopper (264, 164) cause the pulling member (100, 200) to start pulling and stop pulling of the sheet according to detection results of the start detection sensor and the stop detection sensor, respectively. a start detection sensor disposed at a position before the sheet pulling member (100, 200) in the pulling direction to detect a leading end of the sheet in the gap; and a stop detection sensor disposed at a position behind of the sheet pulling member (100, 200) in the pulling direction to detect the leading end of the sheet in the gap, wherein both the start detection sensor and the stop detection sensor do not come into contact with the sheet, and the starter (266, 166) and the stopper (264, 164) cause the pulling member (100, 200) to start pulling and stop pulling of the sheet according to detection results of the start detection sensor and the stop detection sensor, respectively.