An LED lamp includes: a lamp shell including a lamp head, a lamp neck and a sleeve; a passive heat dissipating element having a heat sink connected to the lamp shell, wherein the heat sink comprises fins and a base; a power source; a light emitting surface comprising LED chips; a first heat dissipating channel; a second heat dissipating channel; and a lamp cover; wherein the second end on the upper portion of the lamp neck of the lamp shell is formed with a venting hole, the lamp shell has an airflow limiting surface which extends radially outwardly and is located away from the venting hole, the airflow limiting surface cloaks at least part of the fins.