In this paper, it is studied a novel SAW oscillator by applicating SAW delay characteristics, which can be variable its frequencies by consiting of two output IDT(Inter-Digital Transducer) without external filtering and resonating circuits. The results of experiments showed the temperature characteristics of AT-cut quartz which has been used as frequency-determing substrate of SAW oscillator was good. Though the variable frequencies range was narrow but the experiments showed the possibility to broaden its frequencies range by design of SAW device, and also confromed the stability of fundamental wave oscillating in high frequency range.