A smoking system including a consumable containing a smokable substance and a device that includes a chamber receiving the consumable and heats and atomizes the smokable substance of the consumable received in the chamber , wherein the chamber includes an opening through which the consumable is inserted and a holding unit that holds the consumable , the holding unit includes a first pressing unit which presses a part of the consumable , and a first non-pressing unit , the first pressing unit and the first non-pressing unit each have an inner surface and an outer surface , the consumable includes a first portion (S1) having a first hardness and a second portion (S2) having a second hardness, in which the second portion (S2) is a different portion from the first portion (S1) in the insertion direction of the consumable , when the consumable is positioned at the desired position in the chamber , the consumable is positioned such that at least a part of the first portion (S1) is pressed against the inner surface of the first pressing unit , while at the same time, at least a part of the second portion (S2) is pressed against the inner surface of the first pressing unit , and the distance over which the second portion (S2) of the consumable is inserted into the holding unit when the consumable is positioned at the desired position is equal to or greater than 1.0 mm and less than or equal to 10.0 mm, the opening can receive the consumable without pressing, an air gap is provided between the inner surface of the first non-pressing unit and the consumable when the consumable is positioned at a desired position in the chamber , the air gap connecting the opening in the chamber and the end surface of the consumable positioned at the desired position in the chamber , or the opening in the chamber and the end surface of the consumable positioned inside the chamber and away from the opening in the chamber . the chamber includes an opening through which the consumable is inserted and a holding unit that holds the consumable , the holding unit includes a first pressing unit which presses a part of the consumable , and a first non-pressing unit , the first pressing unit and the first non-pressing unit each have an inner surface and an outer surface , the consumable includes a first portion (S1) having a first hardness and a second portion (S2) having a second hardness, in which the second portion (S2) is a different portion from the first portion (S1) in the insertion direction of the consumable , when the consumable is positioned at the desired position in the chamber , the consumable is positioned such that at least a part of the first portion (S1) is pressed against the inner surface of the first pressing unit , while at the same time, at least a part of the second portion (S2) is pressed against the inner surface of the first pressing unit , and the distance over which the second portion (S2) of the consumable is inserted into the holding unit when the consumable is positioned at the desired position is equal to or greater than 1.0 mm and less than or equal to 10.0 mm, the opening can receive the consumable without pressing, an air gap is provided between the inner surface of the first non-pressing unit and the consumable when the consumable is positioned at a desired position in the chamber , the air gap connecting the opening in the chamber and the end surface of the consumable positioned at the desired position in the chamber , or the opening in the chamber and the end surface of the consumable positioned inside the chamber and away from the opening in the chamber . <EOS>