The present invention addresses the problem of providing a novel DNA aptamer useful for the diagnosis and treatment of lung cancer, the prevention of metastasis of lung cancer and the like.A DNA aptamer which is characterized by having at least one nucleotide sequence selected from sequences respectively represented by SEQ ID NOs: 1 and 2, and is also characterized by being capable of binding specifically to a non-small cell lung cancer cell a composition for detecting a lung cancer cell, which contains the DNA aptamer a kit for detecting a lung cancer cell, which contains the DNA aptamer a method for detecting lung cancer, which is characterized by using the DNA aptamer a detection method comprising a step of bringing the DNA aptamer into contact with a sample collected from a living body, selected from the group consisting of a lung cell, a lung tissue, blood, serum, plasma, saliva and sputum and a step of observing a response associated with the binding of the sample to the DNA aptamer to detect the presence of a lung cancer cell a pharmaceutical composition for preventing the metastasis of lung cancer or treating lung cancer, which contains the DNA aptamer and a drug delivery system for preventing the metastasis of lung cancer or treating lung cancer, which contains the DNA aptamer.La présente invention aborde le problème consistant à fournir un nouvel aptamère dADN qui soit utile pour le diagnostic et le traitement du cancer du poumon, la prévention de la métastase du cancer du poumon et analogues. Linvention concerne un aptamère dADN qui est caractérisé par le fait davoir au moins une séquence nucléotidique choisie parmi des séquences représentées respectivement par les SEQ ID N° : 1 et 2, et est également caractérisé par le fait dêtre capable de se lier spécifiquement à des cellules de cancer du poumon non à petites cellules une composition pour détecter des cellules de cancer du poumon, contenant laptamère dADN un kit pour détecter des cellules de cancer d
