A dehydrogenation reaction catalyst, including a primary phase formed of a perovskite-type oxide represented by a general formula (A.sub.1-xA.sub.x)(Zr.sub.1-y-zB.sub.yB.sub.z)O.sub.3- (in which A represents at least one element selected from alkaline earth metals; A represents at least one element of lanthanum (La) and yttrium (Y); B represents at least one element of titanium (Ti) and cerium (Ce); B represents at least one element selected from among yttrium (Y), scandium (Sc), ytterbium (Yb), aluminum (Al), indium (In), and neodymium (Nd); relationships: 0x0.4, 0.3(1z)1, 0y, and 0<(1yz) are satisfied; and represents an oxygen deficiency), and a secondary phase formed of at least one member of three complex oxides represented by general formulas AB.sub.2O.sub.4, A.sub.2B.sub.2O.sub.5, and A.sub.3B.sub.4O.sub.9, respectively (in which A and B are the same elements as A and B forming the perovskite-type oxide).

A dehydrogenation reaction catalyst, including a primary phase formed of a perovskite-type oxide represented by a general formula (A.sub.1-xA.sub.x)(Zr.sub.1-y-zB.sub.yB.sub.z)O.sub.3- (in which A represents at least one element selected from alkaline earth metals; A represents at least one element of lanthanum (La) and yttrium (Y); B represents at least one element of titanium (Ti) and cerium (Ce); B represents at least one element selected from among yttrium (Y), scandium (Sc), ytterbium (Yb), aluminum (Al), indium (In), and neodymium (Nd); relationships: 0x0.4, 0.3(1z)1, 0y, and 0<(1yz) are satisfied; and represents an oxygen deficiency), and a secondary phase formed of at least one member of three complex oxides represented by general formulas AB.sub.2O.sub.4, A.sub.2B.sub.2O.sub.5, and A.sub.3B.sub.4O.sub.9, respectively (in which A and B are the same elements as A and B forming the perovskite-type oxide).