The present invention provides antituberculous therapeutic drugs with a higher potency. The present invention provides also antituberculous therapeutic drugs containing oxazole compounds represented by (I) general formula (1): [wherein R1 represents a hydrogen atom or C1-6 alkyl group, n represents an integer of 0-6, and R2 represents general formula (A) or the like, wherein R3 represents a phenoxy group (at least one group selected from the group consisting of a halogen atom, an optionally halogen-substituted C1-6 alkyl group and an optionally halogen-substituted C1-6 alkoxy group may be substituted on the phenyl ring) or the like], optically active forms thereof or salts thereof, and drugs (II) such as primary antituberculous drugs.本發明係提供具有較高效能的抗結核治療藥物。本發明亦提供一種抗結核治療藥物，其含有通式(1)所示之噁唑化合物(I)、彼等之光學活性形式或鹽類：[其中，R1示氫原子或C1-6烷基，n示0-6的整數，且R2示通式(A)的基團或其他類似的基團，其中，R3示苯氧基(苯環上可經至少一個選自下列的基團所取代：鹵素原子、任意經鹵素所取代的C1-6烷基以及任意經鹵素所取代的C1-6烷氧基)或其他類似的基團]，以及藥物(II)(諸如，第一線抗結核藥物)。
