The present invention pertains to a movable center-of-gravity tube including: a tube body (41)； a center-of-gravity body (42) movably accommodated inside the tube body； and spherical bodies (43) held by the center-of-gravity body (42). The center-of-gravity body (42) has a slightly smaller diameter than the diameter of an inner circumferential surface of the tube body (41) and has three or more rows of spherical body circulation grooves (44) which are formed on the outer circumferential surface thereof, accommodate and hold the spherical bodies (43) in a circulatable manner, are disposed in parallel with each other, and each comprise two rows of grooves connected to each other (here, when the center-of-gravity body (42) moves, the spherical bodies (43) accommodated in one groove of the spherical body circulation grooves (44) is configured to rotate and circulate in the groove while contacting the inner circumferential surface of the tube body (41), and the spherical bodies (43) accommodated in the other groove is configured to circulate while rotating in a state of not contacting the inner circumferential surface of the tube body (41)). The present invention allows for a relatively simple structure and simple manufacture of the center-of-gravity moving mechanism of a fishing lure and a smooth movement of the center-of-gravity.La présente invention concerne un tube à centre de gravité mobile comprenant : un corps (41) de tube ； un corps de centre de gravité (42) logé de façon mobile à l'intérieur du corps de tube ； et des corps sphériques (43) maintenus par le corps de centre de gravité (42). Le corps de centre de gravité (42) a un diamètre légèrement inférieur au diamètre d'une surface circonférentielle intérieure du corps (41) de tube et comporte trois rangées ou plus de rainures de circulation (44) de corps sphérique qui sont formées sur la surface circonférentielle extérieure de celui-ci, reçoivent et maintiennent les corps sphériques (43) d'une manière circulabl
