A threaded joint for steel pipes comprising a pin having male threads and a box having female threads, wherein the male threads and the female threads are tapered threads having at least a complete thread portion, the threads (11, 21) in the complete thread portion having a roughly trapezoidal thread shape having a crest, a loading flank, and a stabbing flank with threads being separated from each other by thread roots, wherein: either the box or the pin is a first tubular member and the other is a second tubular member, at least part of the threads (11, 21) in the complete thread portion of the first tubular member has a two-step stabbing shape having a stabbing flank with a chamfered portion and a non-chamfered portion, the stabbing flanks of the threads of the second tubular member being not chamfered, said two-step stabbing shape having a stabbing flank angle α of 5 - 45° and a chamfer angle β of 20 - 60°, the threaded joint characterized by meeting the following condition: the following Inequality is satisfied. h ′ = h − z ⋅ 1 − sin β cos ⁢ β − y ⋅ sin β / 2 − α / 2 H ′ = H − h − x cos ⁢ α + x ⋅ sin ⁢ α − y ⋅ sin β / 2 − α / 2 h ′ h ′ + H ′ h / H = 0.25 ≤ h ′ h ′ + H ′ ≤ h ′ h ′ + H ′ h / H = 0.50 wherein α is the stabbing flank angle (degrees) of the non-chamfered portion of the two-step stabbing shape of the first tubular member and a stabbing flank angle (degrees) of the stabbing flank of the second tubular member, β is the chamfer angle (degrees) of the two-step stabbing shape, H is the thread height (mm) of the pin thread, h is the chamfer height (mm) of the two-step stabbing shape, x is the radius of curvature (mm) of the stabbing flanks at the thread crests of the second member, y is the radius of curvature (mm) at the starting point of the chamfer of the two-step stabbing shape, z is the radius of curvature (mm) of the two-step stabbing shape at its thread crest, and the chamfered portion is an upper portion closer to the thread crest of the first tubular member and the non-chamfered portion is a lower portion closer to the thread root of the first tubular member. either the box or the pin is a first tubular member and the other is a second tubular member, at least part of the threads (11, 21) in the complete thread portion of the first tubular member has a two-step stabbing shape having a stabbing flank with a chamfered portion and a non-chamfered portion, the stabbing flanks of the threads of the second tubular member being not chamfered, said two-step stabbing shape having a stabbing flank angle α of 5 - 45° and a chamfer angle β of 20 - 60°, the threaded joint characterized by meeting the following condition: the following Inequality is satisfied. h ′ = h − z ⋅ 1 − sin β cos ⁢ β − y ⋅ sin β / 2 − α / 2 H ′ = H − h − x cos ⁢ α + x ⋅ sin ⁢ α − y ⋅ sin β / 2 − α / 2 h ′ h ′ + H ′ h / H = 0.25 ≤ h ′ h ′ + H ′ ≤ h ′ h ′ + H ′ h / H = 0.50 wherein α is the stabbing flank angle (degrees) of the non-chamfered portion of the two-step stabbing shape of the first tubular member and a stabbing flank angle (degrees) of the stabbing flank of the second tubular member, β is the chamfer angle (degrees) of the two-step stabbing shape, H is the thread height (mm) of the pin thread, h is the chamfer height (mm) of the two-step stabbing shape, x is the radius of curvature (mm) of the stabbing flanks at the thread crests of the second member, y is the radius of curvature (mm) at the starting point of the chamfer of the two-step stabbing shape, z is the radius of curvature (mm) of the two-step stabbing shape at its thread crest, and the chamfered portion is an upper portion closer to the thread crest of the first tubular member and the non-chamfered portion is a lower portion closer to the thread root of the first tubular member. the following Inequality is satisfied. h ′ = h − z ⋅ 1 − sin β cos ⁢ β − y ⋅ sin β / 2 − α / 2 H ′ = H − h − x cos ⁢ α + x ⋅ sin ⁢ α − y ⋅ sin β / 2 − α / 2 h ′ h ′ + H ′ h / H = 0.25 ≤ h ′ h ′ + H ′ ≤ h ′ h ′ + H ′ h / H = 0.50 wherein α is the stabbing flank angle (degrees) of the non-chamfered portion of the two-step stabbing shape of the first tubular member and a stabbing flank angle (degrees) of the stabbing flank of the second tubular member, β is the chamfer angle (degrees) of the two-step stabbing shape, H is the thread height (mm) of the pin thread, h is the chamfer height (mm) of the two-step stabbing shape, x is the radius of curvature (mm) of the stabbing flanks at the thread crests of the second member, y is the radius of curvature (mm) at the starting point of the chamfer of the two-step stabbing shape, z is the radius of curvature (mm) of the two-step stabbing shape at its thread crest, and the chamfered portion is an upper portion closer to the thread crest of the first tubular member and the non-chamfered portion is a lower portion closer to the thread root of the first tubular member.