A bisboron compound having activity to control the intracellular calcium concentration represented by the general formula: wherein B represents a boron atom, Y represents an oxygen or sulfur atom, R 1 and R 2 independently represent a monocyclic aromatic group, a polycyclic aromatic group, or a heterocyclic group containing at least one heteroatom selected from oxygen, nitrogen and sulfur atoms, R 3 represents a hydrogen atom; -(CH 2) 2 -NR 4 R 5, wherein R 4 and R 5 independently represent a hydrogen atom, or C1-C4 alkyl substituted or unsubstituted with amino, mono- or di-C1-C4 alkylamino or phenyl group, or R 4 and R 5 are taken together with the nitrogen atom to which they are bonded to form a 5- or 6-membered cyclic ring; -CO-(CH 2) m -NR 4 R 5, wherein m represents an integer of 1 to 4, and R 4 and R 5 are as defined above;-COCH(NH 2)R 6, wherein R 6 represents an amino acid residue or -(CH 2) n NH 2, wherein n represents an integer of 1 to 3; -CHR 7 R 8, wherein R 7 and R 8 independently represent C1-C4 alkyl substituted or unsubstituted with amino, mono- or di-(amino group-substituted or unsubstituted C1-C4 alkyl)amino or phenyl group, pyridyl, or phenyl substituted with C1-C3 alkoxy group; -CH 2 CH(NH 2)-R 9, wherein R 9 represents phenyl, or C1-C4 alkyl substituted with phenyl group; quinolyl or isoquinolyl substituted with C1-C4 alkyl group; or C1-C4 alkyl substituted with pyridyl, piperidino or pyrrolidinyl group, and X represents a monocyclic aromatic group, a polycyclic aromatic group or a heterocyclic group, which may be the same as or different from R 1 and R 2, or a bifunctional group having a monocyclic aromatic group, polycyclic aromatic group or heterocyclic group bonded to each side of a group selected from the group consisting of O, S, OCH 2, OCH 2 CH 2 OCH 2, and OCH 2 OCH 2 CH 2, or a salt thereof. wherein B represents a boron atom, Y represents an oxygen or sulfur atom, R 1 and R 2 independently represent a monocyclic aromatic group, a polycyclic aromatic group, or a heterocyclic group containing at least one heteroatom selected from oxygen, nitrogen and sulfur atoms, R 3 represents a hydrogen atom; -(CH 2) 2 -NR 4 R 5, wherein R 4 and R 5 independently represent a hydrogen atom, or C1-C4 alkyl substituted or unsubstituted with amino, mono- or di-C1-C4 alkylamino or phenyl group, or R 4 and R 5 are taken together with the nitrogen atom to which they are bonded to form a 5- or 6-membered cyclic ring; -CO-(CH 2) m -NR 4 R 5, wherein m represents an integer of 1 to 4, and R 4 and R 5 are as defined above;-COCH(NH 2)R 6, wherein R 6 represents an amino acid residue or -(CH 2) n NH 2, wherein n represents an integer of 1 to 3; -CHR 7 R 8, wherein R 7 and R 8 independently represent C1-C4 alkyl substituted or unsubstituted with amino, mono- or di-(amino group-substituted or unsubstituted C1-C4 alkyl)amino or phenyl group, pyridyl, or phenyl substituted with C1-C3 alkoxy group; -CH 2 CH(NH 2)-R 9, wherein R 9 represents phenyl, or C1-C4 alkyl substituted with phenyl group; quinolyl or isoquinolyl substituted with C1-C4 alkyl group; or C1-C4 alkyl substituted with pyridyl, piperidino or pyrrolidinyl group, and X represents a monocyclic aromatic group, a polycyclic aromatic group or a heterocyclic group, which may be the same as or different from R 1 and R 2, or a bifunctional group having a monocyclic aromatic group, polycyclic aromatic group or heterocyclic group bonded to each side of a group selected from the group consisting of O, S, OCH 2, OCH 2 CH 2 OCH 2, and OCH 2 OCH 2 CH 2,