An olefin multilayer film, in which a constituent layer containing a polypropylene resin is laminated on at least one surface of a base layer unit containing a cyclic olefin resin, and which has a dielectric breakdown voltage at 135 DEG C of 280 V/[mu]m or more. Provided is an olefin multilayer film which exhibits excellent withstand voltage at high temperatures and excellent reliability in applications as capacitors for high voltage use, and which has elongation at break as well as dimensional stability and insulating properties in a high temperature range, said properties being suitable forapplications as capacitors and the like.