To provide a method for manufacturing a rubber composition capable of producing a tire with excellent weatherability.

The method for manufacturing a rubber composition, which comprises a copolymer of a conjugated diene compound wherein cis-1, 4 binding quantity of the conjugated diene compound moiety is higher than 92% and non-conjugated olefin, includes a process with a temperature condition higher by 20°C than a melting temperature of the non-conjugated olefin moiety in the copolymer.