A heat transfer pipe 21 with grooved inner surface is provided with a pipe body 22 having a pipe axis line ◯ as a center axis line, a plurality of first fins 23 each having a fin height Hf, formed by providing a plurality of spiral grooves 200 at an inner surface of the pipe body 22 along the pipe axis line ◯ and at least a second fin 24 having a fin height hf, provided at a groove bottom of at least one of the spiral groove 200. The fin height hf and a torsion angle α of the second fin 24 are determined respectively to satisfy the following conditions: Hf/15≦hf≦Hf/3 and α=β, when P=W×di×sin β and P≧0.86 wherein a bottom width of the spiral groove 200 is W, a torsion angle of the spiral groove 200 is β, and an inner diameter of the pipe body 22 is di.