  We study the H-dibaryon (uuddss) in holographic QCD for the first time.
Holographic QCD is derived from a QCD-equivalent D-brane system
($S^1$-compactified D4/D8/$\overline{\rm D8}$) in the superstring theory via
the gauge/gravity correspondence. In holographic QCD, all baryons appear as
topological chiral solitons of Nambu-Goldstone bosons and (axial) vector
mesons. In this framework, the H-dibaryon can be described as an SO(3)-type
hedgehog state. We present the formalism of the H-dibaryon in holographic QCD,
and perform the calculation to investigate its properties in the chiral limit.
