PROBLEM TO BE SOLVED: To provide a lottery sales system, allowing a purchaser to purchase a lottery in part of the way and paying a money dividend so that a purchaser who purchase a lottery later is not advantageous.;SOLUTION: This lottery sales system 1 includes: a lottery sales device 20 for selling a lottery taking the final match result throughout a predetermined period of two or more matches played by a predetermined team with the other teams for a predetermined number of times in the predetermined period as an estimated object; and a lottery prize winning money dividend server 10 for paying a money dividend of a lottery to a prize winner who has purchased a lottery and won a prize, wherein the lottery prize winning money dividend server 10 takes all of prize winning money of a predetermined grade paid to prize winners which have purchased a lottery before the start of the first match during a predetermined period of time as a reference prize winning money, and pays a dividend money per unit of the predetermined grade of prize winners who have purchased a lottery during a period when there are remaining matches until the final match after the first match starts in such a manner that the more a lottery is purchased later, the more a money dividend per unit obtained from the reference prize winning money is reduced to be paid.;COPYRIGHT: (C)2010,JPO&INPIT
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