Electronic smoking device, comprising: an elongate housing sleeve having a first end and a second end, and an atomizer section provided in addition to the housing sleeve such that an electrically activatable atomizer including an electric heater and a reservoir containing a liquid are arranged in the atomizer section and are not accommodated in the housing sleeve, wherein the housing sleeve contains an elongate insert that is configured to fit into the housing sleeve via an aperture in one of the ends (62, 64) of the housing sleeve, wherein the following components are mounted on the insert: - a rechargeable battery as an electric power source adapted to power the electrically activatable atomizer, - a puff detector adapted to detect a user requesting the generation of an - aerosol, - control electronics (42, 44) connected to the puff detector and adapted to control the heater of the atomizer, wherein the puff detector is adapted to detect a user requesting the generation of an aerosol, and - a connector, which is mounted at a second end of the insert which is located in the area of the second end of the housing sleeve when the insert is fitted into the device, wherein the connector is adapted to provide a connection to the atomizer section of the electronic smoking device, which comprises the atomizer and the reservoir, wherein the connector is adapted to provide a mechanical connection to the atomizer section of the electronic smoking device and includes electrical connections for the atomizer in the atomizer section. an elongate housing sleeve having a first end and a second end, and an atomizer section provided in addition to the housing sleeve such that an electrically activatable atomizer including an electric heater and a reservoir containing a liquid are arranged in the atomizer section and are not accommodated in the housing sleeve, wherein the housing sleeve contains an elongate insert that is configured to fit into the housing sleeve via an aperture in one of the ends (62, 64) of the housing sleeve, wherein the following components are mounted on the insert: - a rechargeable battery as an electric power source adapted to power the electrically activatable atomizer, - a puff detector adapted to detect a user requesting the generation of an - aerosol, - control electronics (42, 44) connected to the puff detector and adapted to control the heater of the atomizer, wherein the puff detector is adapted to detect a user requesting the generation of an aerosol, and - a connector, which is mounted at a second end of the insert which is located in the area of the second end of the housing sleeve when the insert is fitted into the device, wherein the connector is adapted to provide a connection to the atomizer section of the electronic smoking device, which comprises the atomizer and the reservoir, wherein the connector is adapted to provide a mechanical connection to the atomizer section of the electronic smoking device and includes electrical connections for the atomizer in the atomizer section. - a rechargeable battery as an electric power source adapted to power the electrically activatable atomizer, - a puff detector adapted to detect a user requesting the generation of an - aerosol, - a puff detector adapted to detect a user requesting the generation of an - aerosol, - control electronics (42, 44) connected to the puff detector and adapted to control the heater of the atomizer, wherein the puff detector is adapted to detect a user requesting the generation of an aerosol, and - a connector, which is mounted at a second end of the insert which is located in the area of the second end of the housing sleeve when the insert is fitted into the device, wherein the connector is adapted to provide a connection to the atomizer section of the electronic smoking device, which comprises the atomizer and the reservoir, wherein the connector is adapted to provide a mechanical connection to the atomizer section of the electronic smoking device and includes electrical connections for the atomizer in the atomizer section.