An exhaust gas purifying catalyst according to the present invention includes a catalyst layer 40 that is formed inside a partition wall 16 of a base material 10 having a wall flow structure. The catalyst layer 40 has an upstream-side catalyst layer 20 and a downstream-side catalyst layer 30. The upstream-side catalyst layer 20 includes Rh and a Ce-containing oxide, and the downstream-side catalyst layer 30 includes Pd and a Ce-containing oxide. The mass of the catalyst layer 40 per unit volume of the base material 10 is from 105 g/L to 210 g/L, the mass of the upstream-side catalyst layer 20 per unit volume in an upstream-side portion 10A is from 50 g/L to 100 g/L, the mass of the downstream-side catalyst layer 30 per unit volume in a downstream-side portion 10B is from 100 g/L to 150 g/L, the Ce amount per unit volume of the base material 10 is from 14 g/L to 35 g/L, and the Ce amount per unit volume in the upstream-side portion 10A is from 5 g/L to 20 g/L.