There is provided an organic compound represented by formula [1-1] or [1-2]:where R₁ to R₂₀ are each independently selected from a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an amino group, an aromatic hydrocarbon group, a heterocyclic group, an aryloxy group, a silyl group, and a cyano group, in which at least one of R₁ to R₄ and R₆ to R₉ and at least one of R₁₁ to R₁₄ and R₁₆ to R₁₉ are amino groups; and X₁ to X₄ are each oxygen, sulfur, selenium, or tellurium and are optionally the same or different.