A breast measurement apparatus for measuring a property of a tumor inside a breast of a subject, the apparatus comprising: a distance measurement unit for measuring, for a light absorption portion set inside the breast as a distance measurement object, a distance from a skin to the light absorption portion for a measurement region which is a plurality of normal regions of the breast including no tumor and for a measurement region which is an object region of the breast including a tumor by an ultrasonic measurement method; a light measurement unit, including a light source device for inputting measurement light into the measurement region through a light input unit and a light detection device for detecting output light output from the measurement region through a light output unit, and for measuring a hemoglobin amount in the measurement region by a light measurement method; a correlation data storage unit for storing normal correlation data of the distance to the light absorption portion and a normal hemoglobin amount generated by acquiring the distance to the light absorption portion for each of the plurality of normal regions by the distance measurement unit and acquiring the normal hemoglobin amount in the normal regions by the light measurement unit; and an evaluation value calculation unit for calculating a property evaluation value of the tumor inside the object region based on the normal hemoglobin amount, obtained from the normal correlation data and the distance to the light absorption portion in the object region acquired by the distance measurement unit, and an object hemoglobin amount in the object region acquired by the light measurement unit. a distance measurement unit for measuring, for a light absorption portion set inside the breast as a distance measurement object, a distance from a skin to the light absorption portion for a measurement region which is a plurality of normal regions of the breast including no tumor and for a measurement region which is an object region of the breast including a tumor by an ultrasonic measurement method; a light measurement unit, including a light source device for inputting measurement light into the measurement region through a light input unit and a light detection device for detecting output light output from the measurement region through a light output unit, and for measuring a hemoglobin amount in the measurement region by a light measurement method; a correlation data storage unit for storing normal correlation data of the distance to the light absorption portion and a normal hemoglobin amount generated by acquiring the distance to the light absorption portion for each of the plurality of normal regions by the distance measurement unit and acquiring the normal hemoglobin amount in the normal regions by the light measurement unit; and an evaluation value calculation unit for calculating a property evaluation value of the tumor inside the object region based on the normal hemoglobin amount, obtained from the normal correlation data and the distance to the light absorption portion in the object region acquired by the distance measurement unit, and an object hemoglobin amount in the object region acquired by the light measurement unit.