Provides is an anode for a secondary battery which is suitable for a lithium ion secondary battery and has a high capacity and is excellent in charge/discharge characteristics and generates little of an irreversible capacity. Silicon in an anode active substance layer provided in an anode current collector has an amorphous structure with a low degree of a local order. A Raman spectrum in the amorphous structure after an initial charge/discharge satisfies a relation of 0.25 <=LA/TO and/or a relation of 0.45 <=LO/TO wherein TO is a strength at a dispersing peak occurring near a shift position 480 cm<-1>; by dispersing due to traverse wave optical phonon, LA is a strength at a dispersing peak occurring near a shift position 300 <-1>; by dispersing due to longitudinal wave acoustic phonon and LO is a strength at a dispersing peak occurring near a shift position 400 <-1>; due to longitudinal wave optical phonon.