An object of the present invention is to provide a zeolite enabling a dehydration treatment of a nonaqueous electrolytic solution without causing a problem of elution of sodium from the zeolite at the time of dehydrating a nonaqueous electrolytic solution for a lithium battery by using a zeolite. The present invention relates to a zeolite, wherein from 97.5 to 99.5 mol % of the ion-exchangeable cation is ion-exchanged with lithium, and when this zeolite is used, a nonaqueous electrolytic solution can be dehydrated while keeping the elution of a cation impurity such as sodium down to 50 ppm or less. As for the zeolite species, at least one or more zeolites selected from the group consisting of A-type, chabazite, ferrierite, ZSM-5 and clinoptilolite can be used.