A smoking system comprising a consumable containing a smokable substance and a device that heats and atomizes the smokable substance, wherein the device includes a chamber that receives the consumable, and a heating unit that heats the consumable received into the chamber, the chamber includes an opening through which the consumable is inserted into the chamber in a longitudinal direction of the chamber and a holding unit that holds the consumable, the holding unit includes two or more first pressing units (62, 72) in a circumferential direction of the chamber, which press a part of the consumable, and a non-pressing unit, the first pressing units (62, 72) and the non-pressing unit each have an inner surface (62a, 72a, 66a) and an outer surface (62b, 72b, 66b), wherein the inner surface (62a, 72a) of each of the first pressing units (62, 72) is a flat surface extending along the longitudinal direction of the chamber and having the same distance from the longitudinal axis of the chamber, the consumable includes a first portion having a first hardness and a second portion having a second hardness, in which the second portion is a different portion from the first portion in an insertion direction of the consumable, when the consumable is positioned at a desired position in the chamber, the consumable is positioned such that at least a part of the first portion is pressed against the inner surfaces (62a, 72a) of the first pressing units (62, 72), while at the same time, at least a part of the second portion is pressed against the inner surfaces (62a, 72a) of the first pressing units (62, 72), the second portion includes a cylindrical member, and the cylindrical member is a paper tube or a hollow filter. the device includes a chamber that receives the consumable, and a heating unit that heats the consumable received into the chamber, a chamber that receives the consumable, and a heating unit that heats the consumable received into the chamber, the chamber includes an opening through which the consumable is inserted into the chamber in a longitudinal direction of the chamber and a holding unit that holds the consumable, the holding unit includes two or more first pressing units (62, 72) in a circumferential direction of the chamber, which press a part of the consumable, and a non-pressing unit, the first pressing units (62, 72) and the non-pressing unit each have an inner surface (62a, 72a, 66a) and an outer surface (62b, 72b, 66b), wherein the inner surface (62a, 72a) of each of the first pressing units (62, 72) is a flat surface extending along the longitudinal direction of the chamber and having the same distance from the longitudinal axis of the chamber, the consumable includes a first portion having a first hardness and a second portion having a second hardness, in which the second portion is a different portion from the first portion in an insertion direction of the consumable, when the consumable is positioned at a desired position in the chamber, the consumable is positioned such that at least a part of the first portion is pressed against the inner surfaces (62a, 72a) of the first pressing units (62, 72), while at the same time, at least a part of the second portion is pressed against the inner surfaces (62a, 72a) of the first pressing units (62, 72), the second portion includes a cylindrical member, and the cylindrical member is a paper tube or a hollow filter.