Exhaust gas purification catalyst

An exhaust gas purification catalyst, comprising a support and a catalyst layer provided on the support, wherein

• the catalyst layer includes a plurality of types of mixed oxide particle components containing Ce,
• the plurality of types of mixed oxide particle components include a first mixed oxide particle component containing Ce and a catalytic metal which is partially exposed at particle surfaces, and a second mixed oxide particle component containing Ce, Zr, and a rare earth metal except Ce,
• a particle size distribution of the first mixed oxide particle component has a peak in the particle size range from 100 nm to 300 nm, both inclusive,
• a particle size distribution of the second mixed oxide particle component has a peak in a particle size range higher than the particle size range in which the first mixed oxide particle component has the peak, and
• at least part of particles of the first mixed oxide particle component is attached to at least part of particles of the second mixed oxide particle component.