The present invention relates to an air purifier that is compact enough to fit into a cup holder of a vehicle and that can be deodorized, collected and sterilized, is solid, and is easy to maintain and repair. The air cleaner of the present invention includes a UV LED for photocatalyst (57) installed on a UV LED substrate (55), a photocatalytic filter installed on a surface facing the photocatalyst UV LED from the UV LED substrate, ,including. The photocatalytic filter has a structure in which a photocatalytic substance is coated on a substrate on which a plurality of cells (83) in which an air flow path is formed in a direction toward the photocatalyst UV LED are adjacently formed in parallel.本発明は、車両のカップホルダーに嵌めて使用可能な程度に小型でありながらも、脱臭はもちろん、集塵及び殺菌が可能で、堅固であり、維持補修が簡便な空気清浄器に関する。本発明の空気清浄器は、ＵＶ ＬＥＤ基板（５５）に設置された光触媒用ＵＶ ＬＥＤ（５７）と、前記ＵＶ ＬＥＤ基板から前記光触媒用ＵＶ ＬＥＤと向かう面に離隔して設置される光触媒フィルターと、を含む。前記光触媒フィルターは、前記光触媒用ＵＶ ＬＥＤと向かう方向に空気流動路が形成される複数のセル（８３）が隣接して平行に形成された基体上に光触媒物質がコーティングされた構造である。
