End seal structure for cable closure

An end seal structure for a cable closure capable of ensuring insertion of cables different in diameter into a receiving casing for a cable connection without any sealing tape and substantially facilitating both assembling and disassembling thereof. A split cable spacer which is made of a vulcanized rubber composition of 0 to 10 in hardness or 40 to 90 (100-1 mm) in penetration, and of 500 to 2000% in elongation and 10 to 60 kgf/cm2 in tensile strength is arranged so as to be pressedly contacted with outer peripheries of cables. The split cable spacer is integrally provided with a plurality of seal ribs, which are arranged along the cable insertion passages in a manner to be opposite to each other and spaced from each other at predetermined intervals. A split end seal base is provided with a hinge which permits the split end seal base to be pivotally split into two halves. The split cable spacer is fittedly held in the split end seal base, so that halves of the split cable spacer may be detachably joined to each other through abutting joint faces thereof.