An electronic atomizing device, comprising: a body defining a liquid storage chamber and an inhalation channel; and an atomizing element comprising a porous body and a heat generating structure, the porous body comprising a liquid absorbing surface, an atomizing surface, and a side surface, the liquid absorbing surface being configured to absorb liquid from the liquid storage chamber, the heat generating structure being located on the atomizing surface, the porous body forming an airflow channel, the airflow channel flowing through the atomizing surface and being in communication with the inhalation channel, and at least one segment of the airflow channel extending from the side surface towards an interior of the porous body, wherein the porous body comprises a liquid absorbing portion, an atomizing portion, and a liquid guiding portion located therebetween, which are integrally formed; the liquid absorbing surface is located at a side of the liquid absorbing portion away from the liquid guiding portion, and the atomizing surface is located at a side of the atomizing portion away from the liquid guiding portion, characterized in that the airflow channel comprises a plurality of sub-channels, the sub-channel comprises a first sub-channel, a second sub-channel, and a third sub-channel that are sequentially communicated, the first sub-channel is formed by enclosing a sidewall of the atomizing portion, a sidewall of the liquid guiding portion, and an inner wall of the body, the second sub-channel is located inside the liquid guiding portion, the second sub-channel extends from the side surface towards the interior of the liquid guiding portion, the third sub-channel is located inside the liquid absorbing portion, and the third sub-channel is in communication with the inhalation channel. a body defining a liquid storage chamber and an inhalation channel; and an atomizing element comprising a porous body and a heat generating structure, the porous body comprising a liquid absorbing surface, an atomizing surface, and a side surface, the liquid absorbing surface being configured to absorb liquid from the liquid storage chamber, the heat generating structure being located on the atomizing surface, the porous body forming an airflow channel, the airflow channel flowing through the atomizing surface and being in communication with the inhalation channel, and at least one segment of the airflow channel extending from the side surface towards an interior of the porous body, wherein the porous body comprises a liquid absorbing portion, an atomizing portion, and a liquid guiding portion located therebetween, which are integrally formed; the liquid absorbing surface is located at a side of the liquid absorbing portion away from the liquid guiding portion, and the atomizing surface is located at a side of the atomizing portion away from the liquid guiding portion, characterized in that the airflow channel comprises a plurality of sub-channels, the sub-channel comprises a first sub-channel, a second sub-channel, and a third sub-channel that are sequentially communicated, the first sub-channel is formed by enclosing a sidewall of the atomizing portion, a sidewall of the liquid guiding portion, and an inner wall of the body, the second sub-channel is located inside the liquid guiding portion, the second sub-channel extends from the side surface towards the interior of the liquid guiding portion, the third sub-channel is located inside the liquid absorbing portion, and the third sub-channel is in communication with the inhalation channel.