The present invention provides a solar altimeter capable of measuring the altitude of the sun easily and accurately. Solar altimeter according to an aspect of the present invention is an arc-shaped outer surface, an arc-shaped inner surface, a light-transmitting slit member including a plurality of measurement slits extending from the outer surface to the inner surface, disposed opposite to the inner surface and passing through the measurement slit and an angle member having an angle measuring surface on which sunlight is projected, wherein the measuring slits are arranged to be spaced apart from each other in an outer circumferential direction of the light transmitting slit member.
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