Disclosed are a marker for locating a space-occupying minute lesion in the lung, and a locating and marking system. A marker (10) for locating a locating a space-occupying minute lesion in the lung, comprising a marking main body. The marking main body comprises a head portion, and a self-expanding structure (111) that radially expands by itself after being released from a compression device. The self-expanding structure (111) is connected to the head portion. The self-expanding structure (111) forms an umbrella-shaped structure having a head end and an expanded end after being released from the compression device. The marker (10) further comprises a flexible lifting thread (12), and the flexible lifting thread has a fixed segment and an indwelling segment, wherein the fixed segment is fixed to the head portion； and the indwelling segment is kept at the surface of the lung during a pulmonary surgical procedure to direct a surgeon to mark the position of the main body, and a lifting force can be applied to the indwelling segment such that the tissue of a part to be removed is raised. The marker can be fixed in the lung, and can be directly observed from the surface of the lung and support the lifting of the lung tissue.L'invention concerne un marqueur pour localiser une lésion minuscule occupant un espace dans le poumon, et un système de localisation et de marquage. Un marqueur (10) pour localiser une lésion minuscule occupant un espace dans le poumon comprend un corps principal de marquage. Le corps principal de marquage comprend une partie tête, et une structure auto-extensible (111) qui se dilate radialement en elle-même après avoir été libérée d'un dispositif de compression. La structure auto-extensible (111) est reliée à la partie tête. La structure auto-extensible (111) forme une structure en forme de parapluie ayant une extrémité de tête et une extrémité élargie après avoir été libérée du dispositif de compression. Le marqueur (10) comprend en outre un fil de
