A solid catalyst component mixture for polymerizing olefins that allows a polymer of olefins having both a high melt flowability and rigidity to be easily produced is provided.

A solid catalyst component mixture for polymerizing olefins comprises: a first solid catalyst component for polymerizing olefins containing magnesium, titanium, halogen and a succinate diester compound, and a second solid catalyst component for polymerizing olefins containing magnesium, titanium, halogen and a phthalate diester compound, at a mass ratio of First solid catalyst component for polymerizing olefins:Second solid catalyst component for polymerizing olefins=37:63 to 87:13.