A pipe-making apparatus (3;3C;3D;3E;3F) for forming a spiral pipe (9;9E) by joining edges of adjacent turns of a strip member (90;90E;90G) while spirally winding the strip member (90;90E;90G) along a winding direction, characterized in that the apparatus (3;3C;3D;3E;3F) comprises: a body frame ; a propulsive reaction force imparting portion (10;10E;10F) disposed in the body frame spaced from a joining step position at which the joining is performed, the propulsive reaction force imparting portion (10;10E;10F) imparting a propulsive reaction force (F 10 ) for moving the pipe-making apparatus (3;3C;3D;3E;3F) forward in the winding direction of the strip member (90;90E;90G) to a following strip portion or a preceding spiral pipe portion of the strip member (90;90E;90G), the following strip portion following the preceding spiral pipe portion precedingly made into the pipe (9;9E); and a resisting force imparting portion (30;30B;30C;30D;30E;30F;30G) includes a pair of members (33;33F;34,35;38,39) disposed in the body frame spaced from the propulsive reaction force imparting portion (10;10E;10F) and the joining step position , the pair of members (33;33F;34,35;38,39) catching the preceding spiral pipe portion or the following strip portion from both sides thereof so that a sliding friction is generated between the pair of members (33;33F;34,35;38,39) and the preceding spiral pipe portion or the following strip portion , the resisting force imparting portion (30;30B;30C;30D;30E;30F;30G) imparting a resisting force (F 30 ) along the winding direction to the strip member (90;90E;90G) by friction with the strip member (90;90E;90G) when the pipe-making apparatus (3;3C;3D;3E;3F) is being propelled by the propulsive reaction force (F 10 ), a direction of the resisting force (F 30 ) being opposite to a direction of the propulsive reaction force (F 10 ). a body frame ; a propulsive reaction force imparting portion (10;10E;10F) disposed in the body frame spaced from a joining step position at which the joining is performed, the propulsive reaction force imparting portion (10;10E;10F) imparting a propulsive reaction force (F 10 ) for moving the pipe-making apparatus (3;3C;3D;3E;3F) forward in the winding direction of the strip member (90;90E;90G) to a following strip portion or a preceding spiral pipe portion of the strip member (90;90E;90G), the following strip portion following the preceding spiral pipe portion precedingly made into the pipe (9;9E); and a resisting force imparting portion (30;30B;30C;30D;30E;30F;30G) includes a pair of members (33;33F;34,35;38,39) disposed in the body frame spaced from the propulsive reaction force imparting portion (10;10E;10F) and the joining step position , the pair of members (33;33F;34,35;38,39) catching the preceding spiral pipe portion or the following strip portion from both sides thereof so that a sliding friction is generated between the pair of members (33;33F;34,35;38,39) and the preceding spiral pipe portion or the following strip portion , the resisting force imparting portion (30;30B;30C;30D;30E;30F;30G) imparting a resisting force (F 30 ) along the winding direction to the strip member (90;90E;90G) by friction with the strip member (90;90E;90G) when the pipe-making apparatus (3;3C;3D;3E;3F) is being propelled by the propulsive reaction force (F 10 ), a direction of the resisting force (F 30 ) being opposite to a direction of the propulsive reaction force (F 10 ). <EOS>