Tomi Rantamäki (born 18 September 1968) is a Finnish curler from Espoo.

He has served as the coach of the Chinese Mixed Doubles Curling team since 2021.

Led the Finnish men to a fourth-place finish at the 2015 World Championship.

Finished ninth with the Chinese women's team at the 2021 World Mixed Doubles Championship.

[3] Led the Chinese Mixed Doubles team to the ninth-place finish at the 2022 Winter Olympic.