The compact bill validator including a bill accommodating section comprises: a bill sending mechanism sending the bill inward from an inlet via a sending path; a bill identification section being provided to a mid part of the sending path; a turning section turning a traveling direction of the bill; and a bill accommodating section being contiguous with the bill sending mechanism, the bill accommodating section accommodating the bill which has been turned by the turning section. The bill accommodating section has an extended space, which corresponds to an outer part of the turning section. A rear part of the bill accommodated in the bill accommodating section is curved in the extended space.