Exhaust gas purification catalyst and production method thereof

An exhaust gas purification catalyst containing an oxide 1 that is an oxide of an oxygen storage material with an oxygen release/storage function and an oxide 2 that is represented by the following formula (2):

• LaxM1-xM′O3-δtm (2)
• where M is at least one element selected from the group consisting of Ba, Sr and Ca, M′ is at least one element selected from the group consisting of Fe, Co, Ni and Mn, δ is the amount of oxygen deficiency, x satisfies 0≤x≤1, and δ satisfies 0≤δ≤1,
• wherein the exhaust gas purification catalyst has pores P1-260 with a pore size of from 1 nm to 260 nm, that can be measured by a nitrogen absorption method, and
• a total sum ΣPV1-260 of a pore volume PV1-260 of the pores is equal to or greater than 0.79 cm3/g.