A catalyst for olefin polymerization, comprising:

    • a solid catalyst component comprising
    • [A] a solid component having substantially no hydroxyl group,
    • [B] a compound of a transition metal selected from Groups 3-11 of the Periodic Table, and
    • [C] a mixture of an activator compound (C-1) capable of reacting with the transition metal compound [B] to form a metal complex having catalytic activity and an organoaluminum compound (C-2); and
    • [D] an organomagnesium compound soluble in a hydrocarbon solvent which is obtained by reacting (i) an organomagnesium compound represented by the general formula:

      wherein Mt is a metal atom belonging to Groups 1-3 of the Periodic Table, R1 and R2 are hydrocarbon groups of 2-20 carbon atoms, and , , a and b are numerals satisfying the following relationship: 0, 0, 0a, 0b, a+b0, and r+2=a+b (where r is a valence of Mt) with (ii) a compound selected from an amine, an alcohol and a siloxane.

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