An article used in contact with a living body or a biological sample is provided, the article including a first film and a second film, in which the first film includes an amorphous carbon film in which a proportion of the number of carbon atoms having an sp2-hybrid orbital to a total number of carbon atoms having an sp2-hybrid orbital and carbon atoms having an sp3-hybrid orbital is in a range of 23 to 43 atom% or a titanium-doped amorphous carbon film in which a proportion of the number of titanium atoms to the number of carbon atoms is in a range of 3 to 12 atom%, and the second film includes any one film selected from an amorphous carbon film in which a contact angle with pure water is 10° or less, a titanium-doped amorphous carbon film in which a proportion of the number of titanium atoms to the number of carbon atoms is less than 3 atom% or greater than 12 atom%, or a titanium-doped amorphous carbon film in which a contact angle with pure water is 10° or less.
