Laser Interferometer for Detection of Gravitational Wave-TAMA-300

In National Astronomical Observatory, Japan, Mitaka, a group of scientists has been constructing a laser interferometer with two Fabry-Perot cavities 300m long, one in No rth-South and one in East-West directions.The interferomer is to detect any gravi tational wave near 400Hz frequencyand stronger than 10^-20 by autumn, 1998 all the instruments have been installed in the underground facilities and it will be operated formore than 30 days in April, 1999.Then a recycling device will be installed to increase the sensitivity by factor of 10.In this paper this system as well as other systems such as LIGOs in UAS and VIRGO in Europe will be reviewed.