A water-capturing agent capable of inhibiting the generation and growth of a darkspot and an organic EL device including the water-capturing agent are provided. The organic EL device uses the water-capturing agent comprising a compound illustrated by the chemical structural formula (1); wherein R and R′ are independently a substituent selected from the group consisting of an alkyl group, aryl group, cycloalkyl group, alkoxy group, acyl group and heterocyclic group having an unsaturated bond and one or more of a hydrogen atom and a carbon atom, or a substituent formed by substituting at least one of a hydrogen atom of said group with a halogen atom, and a central atom M is a metal having coordination number of six.