An object of the present invention is to provide a remaining-amount reduction member capable of preventing the generation of space whose periphery is closed by pressurized fluid, reducing a final remaining amount of a content to be ejected, stabilizing an ejection amount of the content per unit time, and smoothly ejecting the content to the end.Provided is a remaining-amount reduction member 110 that is attached inside a flexible interior bag 102 arranged inside an aerosol container 100, the remaining-amount reduction member including: an attachment part 120 attached such that the content F is capable of flowing in an inflow port 103 of the interior bag 102; and a guiding part 130 having a plurality of grooved blocks 132, each of which has a guiding groove 131 in a longitudinal direction, connected in the longitudinal direction.