An uncomfortable sound pressure estimation system, comprising: an HTL acquisition section for acquiring information of hearing threshold levels respectively for a plurality of frequencies; and a UCL estimation section for estimating an uncomfortable sound pressure at a frequency corresponding to a given hearing threshold level acquired by the HTL acquisition section; characterized by a UCL measurement point determination section for determining at least two measurement points at which to measure uncomfortable sound pressures, each of the at least two measurement points at least defining a first frequency concerning a first hearing threshold level and a second frequency concerning a second hearing threshold level among the acquired hearing threshold levels, the second hearing threshold level being of a different level from the first hearing threshold level; a UCL measurement section for measuring uncomfortable sound pressures only with respect to the measurement points determined by the UCL measurement point determination section; and a calculation section for calculating a predetermined criterion representing a relationship between the hearing threshold levels acquired by the HTL acquisition section and the uncomfortable sound pressures measured by the UCL measurement section, by using the hearing threshold levels for the measurement points determined by the UCL measurement point determination section and the uncomfortable sound pressures measured for the measurement points determined by the UCL measurement point determination section; wherein the UCL estimation section is adapted to estimate an uncomfortable sound pressure according to the predetermined criterion, for a frequency other than a frequency corresponding to a measurement point determined by the UCL measurement point determination section. an HTL acquisition section for acquiring information of hearing threshold levels respectively for a plurality of frequencies; and a UCL estimation section for estimating an uncomfortable sound pressure at a frequency corresponding to a given hearing threshold level acquired by the HTL acquisition section; characterized by a UCL measurement point determination section for determining at least two measurement points at which to measure uncomfortable sound pressures, each of the at least two measurement points at least defining a first frequency concerning a first hearing threshold level and a second frequency concerning a second hearing threshold level among the acquired hearing threshold levels, the second hearing threshold level being of a different level from the first hearing threshold level; a UCL measurement section for measuring uncomfortable sound pressures only with respect to the measurement points determined by the UCL measurement point determination section; and a calculation section for calculating a predetermined criterion representing a relationship between the hearing threshold levels acquired by the HTL acquisition section and the uncomfortable sound pressures measured by the UCL measurement section, by using the hearing threshold levels for the measurement points determined by the UCL measurement point determination section and the uncomfortable sound pressures measured for the measurement points determined by the UCL measurement point determination section; wherein the UCL estimation section is adapted to estimate an uncomfortable sound pressure according to the predetermined criterion, for a frequency other than a frequency corresponding to a measurement point determined by the UCL measurement point determination section.