Provided are an aptamer having an inhibitory activity against NGF; a complex containing an aptamer having a binding activity or inhibitory activity against NGF and a functional substance (e.g., affinity substances, labeling substances, enzymes, drug delivery vehicles, drugs and the like); a medicament, a diagnostic agent, a labeling agent and the like containing an aptamer having a binding activity or inhibitory activity against NGF, or a complex containing the aptamer and the functional substance; and the like.