An alkoxide compound is represented by General Formula (I) below: wherein R1 to R3 each independently represent hydrogen, a C1-12 hydrocarbon group, etc.; R4 represents a C1-12 hydrocarbon group, etc.; L represents hydrogen, halogen, a hydroxyl group, an amino group, an azi group, a phosphido group, a nitrile group, a carbonyl group, a C1-12 hydrocarbon group, etc.; and M represents a metal atom or a silicon atom, n represents an integer of 1 or more, m represents an integer of 0 or more, and n+m represents the valence of the metal atom or silicon atom.