Foreign matter is prevented from entering the inside of an electronic apparatus. An electronic apparatus (100) includes plural exhaust holes (E1, E2) formed in an armor member (20), an air flow path (S3) formed inside the armor member (20) and connected to the plural exhaust holes (E1, E2), a power source circuit (41) disposed in the air flow path (S3), and a foreign matter preventing member (70) located between the power source circuit (41) and the plural exhaust holes (E1, E2). The foreign matter preventing member (70) is formed with plural openings (Es). Each of the openings (Es) is smaller in size than each of the exhaust holes (E1, E2).