Although a means for suppressing pin seal section deformation has been disclosed previously, no method for resolving the issues resulting from box side deformation has been disclosed. Provided is a threaded joint for a pipe, that fulfills 0.05°≤&thetas;sb-&thetas;sp≤2.0° for the relationship between: the angle (&thetas;sb) formed between an insertion surface (21) for a female screw on a box (1) side and a surface perpendicular to the pipe axis; and the angle (&thetas;sp) formed between an insertion surface (20) for a male screw on a pin (3) side facing the insertion surface (21) for the female screw, and the surface perpendicular to the pipe axis.
