A ski boot comprises an essentially stiff outer boot and a soft inner boot (49) or inner lining for receiving the foot of a skier. The sole (13) of the outer boot is made of an essentially rigid material, preferably plastics, comprising an elastic zone (15) in the metatarsal region of the sole (13). The elastic zone (15) divides the sole (13) into front and rear sole portions (19, 17). An intermediate upper shell portion (29) is provided between the front and rear shell portions (27, 21) of the outer boot, which is designed such that front and rear shell portions (27, 21) are pivotable with respect to each other. The heel portion (23) and rear sole portion (17) are designed to be in an essentially rigid relationship such that a maximum force can be applied to the elastic zone (15) of the boot. When the skier leans forward the front and rear shell portions (27, 21) pivot relative to each other. Due to the attachment of the lower leg to the rigid spoiler shaft (25), the ankle of the skier is braced securely to not flex or bend and the center of gravity of the skier can therefore remain in its most favored and athletically efficient position.