ASCA has observed ~20 cataclysmic variables since launch. In this review, we present the current status of ASCA observations of CVs and scientific results. In Sect. 2, we introduce the scientific instruments of ASCA, and show the list of CVs observed so far. Data analysis and results on magnetic and non-magnetic CVs are described in Sect. 3 and 4, respectively. In Sect. 5, we make a brief summary.