A photopolymerizable composition is disclosed, comprising i) an addition polymerizable compound having an ethylenically unsaturated double bond, ii) a sensitizing dye represented by the following formula (I) and iii) a titanocene compound: ##STR1## wherein R.sup.1, R.sup.2, R.sup.7 and R.sup.8 each represents a hydrogen atom, an alkyl group, an aryl group or an alkenyl group, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 each represents a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an alkoxy group or an alkoxycarbonyl group, R.sup.1 and R.sup.2 may be combined with each other to form a ring together with the nitrogen atom or R.sup.1 and R.sup.5 or R.sup.2 and R.sup.3 may be combined with each other to form a ring together with the carbon atoms and the nitrogen atom, R.sup.3 and R.sup.4 or R.sup.5 and R.sup.6 may be combined with each other to form a ring together with the two carbon atoms, X.sup.1 represents an oxygen atom or a sulfur atom, and n represents 0, 1 or 2.