The invention discloses a head protection device and an infant carrier including the head protection device, which is suitable for being sleeved outside a shoulder strap of an infant carrier and an adjustment buckle wound around the shoulder strap, the shoulder strap is connected between a backrest and a seat body of the infant carrier, the head protection device comprises a protective sheet, a connecting member and a positioning member both disposed on the protective sheet, left and right ends of the protective sheet are detachably connected by the connecting member, so as to be capable of being sleeved outside the shoulder strap and the adjustment buckle, the positioning member is used to be clamped with the adjustment buckle and / or the shoulder strap wound around the adjustment buckle, such that the adjustment buckle and the shoulder strap wound around the adjustment buckle are always wrapped in the head protection device.