A measurement kit for latex turbidimetric immunoassay comprising a first reagent and a second reagent, wherein the first reagent contains compound having a partial structure of NH 2 -C=N- and a cyclic structure in a molecule, wherein the compound having a partial structure of NH 2 -C=N- and a cyclic structure in a molecule is compounds represented by Formula or salt or ester thereof and Formula or salt thereof: the compound of Formula being a compound of [in Formula, R 1 is a hydrogen atom, a hydroxyl group, or an alkyl group having the carbon number of 1, 2, or 3 that may be branched, and R 2 to R 6 each independently represent a hydrogen atom, a halogen atom, an alkyl group having the carbon number of 1, 2, or 3 that may be branched, a hydroxyl group, a carboxy group, an amino group, or -SR 7 (R 7 represents a hydrogen atom, a hydroxyl group, or an alkyl group having the carbon number of 1, 2, or 3 that may be branched and, when a plurality of R 7 s are present, R 7 s may be the same groups as or different groups from each other)]; and the compound of Formula being a compound of [in Formula, R 11 to R 14 each independently represent a hydrogen atom, a halogen atom, an alkyl group having the carbon number of 1, 2, or 3 that may be branched, an amino group, a phenyl group that may be substituted with a halogen atom, or -SR 16 (R 16 represents a hydrogen atom, a hydroxyl group, or an alkyl group having the carbon number of 1, 2, or 3 that may be branched and, when a plurality of R 16 s are present, R 16 s may be the same groups as or different groups from each other), wherein R 11 and R 12 present in the same molecule may form a carbonyl group together and R 13 and R 14 present in the same molecule may form a carbonyl group together, R 15 represents a hydrogen atom, a halogen atom, or an alkyl group having the carbon number of 1, 2, or 3 that may be branched, X 11 is a nitrogen atom or a sulfur atom, X 12 and X 13 are each independently a carbon atom or a nitrogen atom, and 11, 12, m1, m2, and n are each independently 0 or 1, a double broken line between X 11 and X 13 and a double broken line between X 12 and X 13 are each independently a single bond or a double bond, wherein the values of 11, 12, m1, m2, and n as well as the bonds of the double broken line between X 11 and X 13 and the double broken line between X 12 and X 13 indicate values and bonds appropriately determined depending on the valences of X 11 to X 13], wherin the second reagent contains latex particles having an antibody immobilized thereon, wherein the antibody is an anti-L-FABP antibody. the compound of Formula being a compound of [in Formula, R 1 is a hydrogen atom, a hydroxyl group, or an alkyl group having the carbon number of 1, 2, or 3 that may be branched, and R 2 to R 6 each independently represent a hydrogen atom, a halogen atom, an alkyl group having the carbon number of 1, 2, or 3 that may be branched, a hydroxyl group, a carboxy group, an amino group, or -SR 7 (R 7 represents a hydrogen atom, a hydroxyl group, or an alkyl group having the carbon number of 1, 2, or 3 that may be branched and, when a plurality of R 7 s are present, R 7 s may be the same groups as or different groups from each other)]; and the compound of Formula being a compound of [in Formula, R 11 to R 14 each independently represent a hydrogen atom, a halogen atom, an alkyl group having the carbon number of 1, 2, or 3 that may be branched, an amino group, a phenyl group that may be substituted with a halogen atom, or -SR 16 (R 16 represents a hydrogen atom, a hydroxyl group, or an alkyl group having the carbon number of 1, 2, or 3 that may be branched and, when a plurality of R 16 s are present, R 16 s may be the same groups as or different groups from each other), wherein R 11 and R 12 present in the same molecule may form a carbonyl group together and R 13 and R 14 present in the same molecule may form a carbonyl group together, R 15 represents a hydrogen atom, a halogen atom, or an alkyl group having the carbon number of 1, 2, or 3 that may be branched, X 11 is a nitrogen atom or a sulfur atom, X 12 and X 13 are each independently a carbon atom or a nitrogen atom, and 11, 12, m1, m2, and n are each independently 0 or 1, a double broken line between X 11 and X 13 and a double broken line between X 12 and X 13 are each independently a single bond or a double bond, wherein the values of 11, 12, m1, m2, and n as well as the bonds of the double broken line between X 11 and X 13 and the double broken line between X 12 and X 13 indicate values and bonds appropriately determined depending on the valences of X 11 to X 13], wherin the second reagent contains latex particles having an antibody immobilized thereon, wherein the antibody is an anti-L-FABP antibody.