PROBLEM TO BE SOLVED: To provide a lamp for sterilization that can efficiently irradiate light to a bottom and the like of a container and a sterilization method using the lamp for sterilization.SOLUTION: A lamp 10 for sterilization comprises: a light emitting tube 21 for sterilization that is stored in a tubular outer sphere 31, at least tip of which is inserted into a container to be sterilized, or a preform 11 and a reflection film 33 that functions as a light control portion which radiates, from a tip of the outer sphere 31, light radiated in a circumferential direction from the light emitting tube 21.SELECTED DRAWING: Figure 1