PURPOSE: To obtain a hollow tube stock minimized in eccentric spiral thickness deviation by specifying the relationship between the diameter of a hollow billet and the interval between inclined rolls at the time of obtaining the hollow tube stock using a cross herical mill having disk rolls.

CONSTITUTION: The cross herical rolling mill having a pair of the inclined rolls 1 which are arranged on both sides of a plug and a pair of disk rolls 2 which are arranged between these inclined rolls is used. By use of this rolling mill, a hollow tube stock H whose outside diameter ratio to a solid billet is ≥1.15 times is manufactured from the solid billet B. At that time, when the shortest interval between the inclined rolls is expressed by Ro, the shortest interval between the disk rolls by Do, the outside diameter of the solid billet B by Db, the interval between the inclined rolls at the position of the max. outside diameter of the plug by Rp, the interval between the disk rolls at the position of the max. outside diameter of the plug by Dp, in the case the inclined roll 1 is a barrel type, the relationship of the inequality I is satisfied and, in the case the roll is a cone type, the inequality II is satisfied. And, piercing is executed under the conditions under which the relationship of the inequalities III, IV is satisfied. In this way, the hollow tube stock having small thickness deviation rate is manufactured at a high efficiency.