The solid olefin polymerization catalyst component, an olefin polymerization catalyst and a method for producing an olefin-based polymer

An olefinic polymerization solid catalyst component comprising titanium, magnesium, halogen and a compound represented by the following formula (1): R1O-C (= O) -OZ-OR2 (1). An olefinic polymerization catalyst the solid catalyst component and an organoaluminum compound and the external is formed by the electron donor compound required. By using the olefin polymerization solid catalyst component and an olefin polymerization catalyst, it is possible while retaining high stereoregularity, and also obtain a high yield moderately neither wide nor narrow molecular weight distribution polymer having olefin.