Disclosed are an inhaler, an atomizing assembly (100) and an atomizing core (140). The atomizing assembly (100) of the abovementioned inhaler comprises a shell (120) and the atomizing core (140) disposed to be joined with the shell (120). The shell (120) is internally provided with a gas flow passage (121) and a liquid storage cavity (122) which encircles the gas flow passage (121) and serves for liquid storage； the atomizing core (140) comprises a core body (141), an exhaust tube (142) and an atomizing element (143), the core body (141) is internally provided with an atomizing cavity (1411), and the exhaust tube (142) is disposed at a gas outlet (1413)； the atomizing element (143) is disposed within the atomizing cavity (1411) and is used for liquid atomization； at least a part of the exhaust tube (142) extends into the gas flow passage (121), and a through hole (1422) or a gap (1423a-1423d) which communicates with the interior of the exhaust tube (142) and the gas flow passage (121) is disposed on the sidewall of the exhaust tube (142).
