Disclosed is a crimping terminal that suppresses as far as possible an increase in contact resistance with an electrical wire even in a severe thermal impact environment. A crimping terminal is formed into a substantial U-shape section with a bowed bottom plate. Also, a bead is formed whose in inner surface is made convex by punching a concave shape from an outer surface of a wall plate, on the wall plate at any position in a range from at least a bottom plate to a conductor swage piece. A work hardening portion hardened by crushing at a center portion in a width direction of the bottom plate is also formed.