A dose rate measuring device comprising: - a detection unit including first radiation detection means for detecting radiation and outputting an analog voltage pulse and a direct-current voltage, and second radiation detection means (22a, 22b, 22c, 27) for detecting radiation in three or more sensor units and outputting analog voltage pulses; and - a measurement unit including low-range dose rate calculation means (352, 353) for converting a first pulse height spectrum, obtained by the analog voltage pulse which is output from the first radiation detection means, into a low-range dose rate, high-range dose rate calculation means (33, 34, 354) for converting the direct-current voltage, which is output from the first radiation detection means, into a high-range dose rate, and energy compensation factor determination means (355, 356) for determining an energy compensation factor for the high-range dose rate on the basis of an average pulse height value obtained from a second pulse height spectrum obtained by the analog voltage pulses which are output from the second radiation detection means (22a, 22b, 22c, 27), - wherein the respective sensor units of the second radiation detection means (22a, 22b, 22c, 27) are installed at positions where incidence of radiation on the first radiation detection means is not blocked, at equal intervals centered on a central axis of the first radiation detection means and at equal angles with respect to a plane which is at a right angle to the central axis, and are disposed so that a sum of areas seen through sensitive surfaces of the respective sensor units from a direction parallel to the central axis, and areas seen through the sensitive surfaces of the respective sensor units from a direction at a right angle to the central axis become equal to each other, and wherein the high-range dose rate calculation means is adapted to multiply the high-range dose rate by the energy compensation factor acquired from the energy compensation factor determination means, and to compensate for energy characteristics of the high-range dose rate. - a detection unit including first radiation detection means for detecting radiation and outputting an analog voltage pulse and a direct-current voltage, and second radiation detection means (22a, 22b, 22c, 27) for detecting radiation in three or more sensor units and outputting analog voltage pulses; and - a measurement unit including low-range dose rate calculation means (352, 353) for converting a first pulse height spectrum, obtained by the analog voltage pulse which is output from the first radiation detection means, into a low-range dose rate, high-range dose rate calculation means (33, 34, 354) for converting the direct-current voltage, which is output from the first radiation detection means, into a high-range dose rate, and energy compensation factor determination means (355, 356) for determining an energy compensation factor for the high-range dose rate on the basis of an average pulse height value obtained from a second pulse height spectrum obtained by the analog voltage pulses which are output from the second radiation detection means (22a, 22b, 22c, 27), - wherein the respective sensor units of the second radiation detection means (22a, 22b, 22c, 27) are installed at positions where incidence of radiation on the first radiation detection means is not blocked, at equal intervals centered on a central axis of the first radiation detection means and at equal angles with respect to a plane which is at a right angle to the central axis, and are disposed so that a sum of areas seen through sensitive surfaces of the respective sensor units from a direction parallel to the central axis, and areas seen through the sensitive surfaces of the respective sensor units from a direction at a right angle to the central axis become equal to each other, and