An analyzer, comprising: a plurality of first containers and a plurality of second containers; a first rotational support rotatable about a rotation center and supporting the plurality of first containers annularly placed around the rotation center; a second rotational support rotatable about the rotation center independently from the first rotational support, and supporting the plurality of second containers placed around the rotation center to surround the first containers, wherein a radius of the first rotational support is smaller than a radius of the second rotational support; and a reader provided radially outward of the rotational supports (33A, 33B) with respect to the rotation center, configured to emit an emission line in a given direction different from a radially inward direction with respect to the rotation center and optically read a first reading target applied to a first surface of each of the first containers positioned at first reading positions through a gap within a circumferential row of the plurality of second containers, and a second reading target applied to a second surface of each of the second containers positioned at second reading positions, wherein a first angle (β1) between a first normal line direction of the first surface at the first reading position and a radially outward direction with respect to the rotation center is set to be different from a second angle (β2) between a second normal line direction of the second surface at the second reading position and the radially outward direction, such that at the reading positions and, a respective first angle (α1) and a second angle (α2) between the direction and the respective normal line directions and are such that optical reading of the respective first and second reading targets applied to the respective first and second surfaces by the reader is possible. a plurality of first containers and a plurality of second containers; a first rotational support rotatable about a rotation center and supporting the plurality of first containers annularly placed around the rotation center; a second rotational support rotatable about the rotation center independently from the first rotational support, and supporting the plurality of second containers placed around the rotation center to surround the first containers, wherein a radius of the first rotational support is smaller than a radius of the second rotational support; and a reader provided radially outward of the rotational supports (33A, 33B) with respect to the rotation center, configured to emit an emission line in a given direction different from a radially inward direction with respect to the rotation center and optically read a first reading target applied to a first surface of each of the first containers positioned at first reading positions through a gap within a circumferential row of the plurality of second containers, and a second reading target applied to a second surface of each of the second containers positioned at second reading positions, wherein a first angle (β1) between a first normal line direction of the first surface at the first reading position and a radially outward direction with respect to the rotation center is set to be different from a second angle (β2) between a second normal line direction of the second surface at the second reading position and the radially outward direction, such that at the reading positions and, a respective first angle (α1) and a second angle (α2) between the direction and the respective normal line directions and are such that optical reading of the respective first and second reading targets applied to the respective first and second surfaces by the reader is possible.