An oil-well metal pipe, comprising: a pipe main body including a first end portion and a second end portion, wherein: the pipe main body includes: a pin formed at the first end portion, and a box formed at the second end portion; the pin includes: a pin contact surface which at least has an external thread part formed on an outer peripheral surface of the first end portion of the pipe main body; the box includes: a box contact surface which at least has an internal thread part formed on an inner peripheral surface of the second end portion of the pipe main body; a plating layer is formed on a first contact surface, the first contact surface being one of the pin contact surface and the box contact surface; a solid lubricant layer is formed on the plating layer; characterized in that: an arithmetic average roughness Ra of a second contact surface is within a range of 0.5 to 10.0 μm, the second contact surface being the other of the pin contact surface and the box contact surface; and a semi-solid or liquid anti-rust coating is formed on the second contact surface. a pipe main body including a first end portion and a second end portion, wherein: the pipe main body includes: a pin formed at the first end portion, and a box formed at the second end portion; the pin includes: a pin contact surface which at least has an external thread part formed on an outer peripheral surface of the first end portion of the pipe main body; the box includes: a box contact surface which at least has an internal thread part formed on an inner peripheral surface of the second end portion of the pipe main body; a plating layer is formed on a first contact surface, the first contact surface being one of the pin contact surface and the box contact surface; a solid lubricant layer is formed on the plating layer; characterized in that: an arithmetic average roughness Ra of a second contact surface is within a range of 0.5 to 10.0 μm, the second contact surface being the other of the pin contact surface and the box contact surface; and a semi-solid or liquid anti-rust coating is formed on the second contact surface. a pin formed at the first end portion, and a box formed at the second end portion; the pin includes: a pin contact surface which at least has an external thread part formed on an outer peripheral surface of the first end portion of the pipe main body; the box includes: a box contact surface which at least has an internal thread part formed on an inner peripheral surface of the second end portion of the pipe main body; a plating layer is formed on a first contact surface, the first contact surface being one of the pin contact surface and the box contact surface; a solid lubricant layer is formed on the plating layer; characterized in that: an arithmetic average roughness Ra of a second contact surface is within a range of 0.5 to 10.0 μm, the second contact surface being the other of the pin contact surface and the box contact surface; and a semi-solid or liquid anti-rust coating is formed on the second contact surface. a pin contact surface which at least has an external thread part formed on an outer peripheral surface of the first end portion of the pipe main body; the box includes: a box contact surface which at least has an internal thread part formed on an inner peripheral surface of the second end portion of the pipe main body; a plating layer is formed on a first contact surface, the first contact surface being one of the pin contact surface and the box contact surface; a solid lubricant layer is formed on the plating layer; characterized in that: an arithmetic average roughness Ra of a second contact surface is within a range of 0.5 to 10.0 μm, the second contact surface being the other of the pin contact surface and the box contact surface; and a semi-solid or liquid anti-rust coating is formed on the second contact surface. a box contact surface which at least has an internal thread part formed on an inner peripheral surface of the second end portion of the pipe main body; a plating layer is formed on a first contact surface, the first contact surface being one of the pin contact surface and the box contact surface; a solid lubricant layer is formed on the plating layer; characterized in that: an arithmetic average roughness Ra of a second contact surface is within a range of 0.5 to 10.0 μm, the second contact surface being the other of the pin contact surface and the box contact surface; and a semi-solid or liquid anti-rust coating is formed on the second contact surface.