A pipe-making apparatus (3;3B;3C;3D;3E;3F;3G;3H) for making a spiral pipe by spirally winding a strip member (90; 90G) while being propelled along a winding direction of the spiral winding, wherein the apparatus comprises: an apparatus frame configured to be disposed in an extending end portion of a precedingly spirally formed preceding pipe portion of the strip member (90; 90G); wherein the apparatus frame includes a drive unit frame and a guide frame, wherein the drive unit frame is disposed on a front side portion in a propulsion front-rear direction and a head portion in a machine height direction of the pipe-making apparatus, and wherein the guide frame extends from the drive unit frame rearward in the propulsion front-rear direction and toward a basal portion in the machine height direction of the pipe-making apparatus, a pipe-making part disposed in the apparatus frame, wherein the pipe-making part includes a drive part contained in the drive unit frame and a pipe end guide unit, wherein the drive part includes a pair of driving rollers configured to obliquely push an unformed following strip portion following the preceding pipe portion in the strip member (90, 90G) from an inner peripheral side of the extending end portion to a fitting position, and wherein the pipe end guide unit is disposed in the basal portion of the guide frame and includes a pipe end guide (21,22,23;22C,23;21,83b,84) configured to guide the extending end portion, the pipe-making part configured to fit an edge of the following strip portion with a corresponding edge of the preceding pipe portion preceding by one turn on the fitting position; a fitting height adjuster (30;40;50,22;22C;21e,21g;60;70;80;22,23) variably adjusting the fitting position in the machine height direction or a pipe inside-outside direction of the spiral pipe, the machine height direction orthogonal to a propulsion front-rear direction of the apparatus frame; wherein the fitting height adjuster (30;40) is configured to angle-adjust a machine width direction of the apparatus frame so as to be inclined with respect to a pipe axis (L 9) of the spiral pipe, the machine width direction being orthogonal to the propulsion front-rear direction and the machine height direction and the pipe-making apparatus is configured to do the pipe-making in a condition in which the extending end portion is open to the inner peripheral side. an apparatus frame configured to be disposed in an extending end portion of a precedingly spirally formed preceding pipe portion of the strip member (90; 90G); wherein the apparatus frame includes a drive unit frame and a guide frame, wherein the drive unit frame is disposed on a front side portion in a propulsion front-rear direction and a head portion in a machine height direction of the pipe-making apparatus, and wherein the guide frame extends from the drive unit frame rearward in the propulsion front-rear direction and toward a basal portion in the machine height direction of the pipe-making apparatus, a pipe-making part disposed in the apparatus frame, wherein the pipe-making part includes a drive part contained in the drive unit frame and a pipe end guide unit, wherein the drive part includes a pair of driving rollers configured to obliquely push an unformed following strip portion following the preceding pipe portion in the strip member (90, 90G) from an inner peripheral side of the extending end portion to a fitting position, and wherein the pipe end guide unit is disposed in the basal portion of the guide frame and includes a pipe end guide (21,22,23;22C,23;21,83b,84) configured to guide the extending end portion, the pipe-making part configured to fit an edge of the following strip portion with a corresponding edge of the preceding pipe portion preceding by one turn on the fitting position; a fitting height adjuster (30;40;50,22;22C;21e,21g;60;70;80;22,23) variably adjusting the fitting position in the machine height direction or a pipe inside-outside direction of the spiral pipe, the machine height direction orthogonal to a propulsion front-rear direction of the apparatus frame; wherein the fitting height adjuster (30;40) is configured to angle-adjust a machine width direction of the apparatus frame so as to be inclined with respect to a pipe axis (L 9) of the spiral pipe, the machine width direction being orthogonal to the propulsion front-rear direction and the machine height direction and the pipe-making apparatus is configured to do the pipe-making in a condition in which the extending end portion is open to the inner peripheral side.