Provided is, for example, an exhaust gas-purifying three-way catalyst which is small in the amount of a platinum group element used, which can be early increased in temperature to a catalytically active temperature, which is suppressed in degradation in performance due to a catalyst poison included in an exhaust gas even if placed directly under an engine, and which is excellent in purification performance. An exhaust gas-purifying three-way catalyst including at least a catalyst carrier 11 and a catalyst layer 21, wherein the catalyst layer 21 has a layered structure having at least a first catalyst layer L1, a second catalyst layer L2 and a third catalyst layer L3 in the listed order, the first catalyst layer L1 contains a first composite catalyst particle including palladium supported on a first base material particle, the second catalyst layer L2 contains a second composite catalyst particle including rhodium supported on a second base material particle, the third catalyst layer L3 contains a third composite catalyst particle including palladium supported on a third base material particle, and the total coating weight Wt in the catalyst layers L1, L2, and L3 (provided that the platinum group element included in each of the catalyst layers is excluded) is 110 g/L or more and 225 g/L or less in total, per volume of the catalyst carrier 11.