A catalyst for a cross-coupling reaction used in a cross-coupling reaction comprising, a carrier part composed of a synthetic resin, an organometallic complex part immobilized on the carrier part by chemical bonding, wherein, the coordination center of the organometallic complex is Pd, the organometallic complex of the precursor of the organometallic complex part has a structure represented by the following formula, the synthetic resin precursor of the precursor of the carrier part has a structure represented by the following formula, the catalyst having a structure represented by the following formula corresponding to a product of a condensation reaction represented by the following formula in which the organometallic complex and the synthetic resin precursor are used as reactants, wherein, in the formula, R 1 and R 2 may be the same or different and are, respectively, at least one substituent selected from the group consisting of hydrogen atom, alkyl group, alkoxy group, alkenyl group, alkynyl group, and aryl group, R 3, R 4, R 5, R 6, R 8 and R 9 may be the same or different and are, respectively, at least one substituent selected from the group consisting of hydrogen atom, halogen atom, alkyl group, alkoxy group, alkenyl group, alkynyl group, aryl group, hydroxy group, hydroxylate group, thiocarboxy group, dithiocarboxy group, sulfo group, sulfino group, oxycarbonyl group, carbamoyl group, hydradinocarbonyl group, amidino group, cyano group, isocyano group, cyanato group, isocyanato group, thiocyanato group, isothiocyanato group, formyl group, oxo group, thioformyl group, thioxo group, mercapto group, amino group, imino group, hydradino group, allyloxy group, sulfide group, nitro group, and silyl group, X and R 7 may be the same or different and are, respectively, halogen atom coordinatable to Pd of the coordination center, a substituent having carbon number of 3 to 20 with a π bond coordinatable to Pd of the coordination center, or, a ligand selected from amine compound, phosphine compound, nitrile compound, sulfur compound or isocyanide compound, RS1 represents the main chain of the synthetic resins precursor having a - CH 2 OH group at the end represented by the formula, in the formula and the formula, X, R 1, R 2, R 3, R 4, R 5, R 6, R 7, R 8 and R 9 represent the same substituents as X, R 1, R 2, R 3, R 4, R 5, R 6, R 7, R 8 and R 9 in the formula, and in the formula, RS1 represents the same main chain of the synthetic resin precursor as RS1 in the formula. an organometallic complex part immobilized on the carrier part by chemical bonding, wherein, the coordination center of the organometallic complex is Pd, the organometallic complex of the precursor of the organometallic complex part has a structure represented by the following formula, the synthetic resin precursor of the precursor of the carrier part has a structure represented by the following formula, the catalyst having a structure represented by the following formula corresponding to a product of a condensation reaction represented by the following formula in which the organometallic complex and the synthetic resin precursor are used as reactants, wherein, in the formula, R 1 and R 2 may be the same or different and are, respectively, at least one substituent selected from the group consisting of hydrogen atom, alkyl group, alkoxy group, alkenyl group, alkynyl group, and aryl group, R 3, R 4, R 5, R 6, R 8 and R 9 may be the same or different and are, respectively, at least one substituent selected from the group consisting of hydrogen atom, halogen atom, alkyl group, alkoxy group, alkenyl group, alkynyl group, aryl group, hydroxy group, hydroxylate group, thiocarboxy group, dithiocarboxy group, sulfo group, sulfino group, oxycarbonyl group, carbamoyl group, hydradinocarbonyl group, amidino group, cyano group, isocyano group, cyanato group, isocyanato group, thiocyanato group, isothiocyanato group, formyl group, oxo group, thioformyl group, thioxo group, mercapto group, amino group, imino group, hydradino group, allyloxy group, sulfide group, nitro group, and silyl group, X and R 7 may be the same or different and are, respectively, halogen atom coordinatable to Pd of the coordination center, a substituent having carbon number of 3 to 20 with a π bond coordinatable to Pd of the coordination center, or, a ligand selected from amine compound, phosphine compound, nitrile compound, sulfur compound or isocyanide compound, RS1 represents the main chain of the synthetic resins precursor having a - CH 2 OH group at the end represented by the formula, in the formula and the formula, X, R 1, R 2, R 3, R 4, R 5, R 6, R 7, R 8 and R 9 represent the same substituents as X, R 1, R 2, R 3, R 4, R 5, R 6, R 7, R 8 and R 9 in the formula, and in the formula, RS1 represents the same main chain of the synthetic resin precursor as RS1 in the formula.