A delegation mediating apparatus which presents a voter who wants to collect delegations to another voter who is looking for a delegatee, in a decision to be made by voting by multiple voters, the apparatus including, voting history storage unit for storing each voter's past voting history in a voting history storage unit, similarity degree calculation unit for calculating a degree of voting action similarity between the voter who wants to collect delegations and the other voter who is looking for a delegatee, with the use of the past voting history stored in the voting history storage unit, and delegatee presentation unit for presenting the voter who wants to collect delegations if the degree of similarity to the other voter who is looking for a delegatee is high, to the other voter who is looking for a delegatee.
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