The AM CVn-type helium cataclysmic variable CR Boo is reported to enter a faint phase, after its prolonged bright state from the beginning of this season. Observations: YYMMDD(UT) mag code 970423.969 145 POY 970429.941 147 POY 970430.858 <155 JEN 970430.967 148 POY 970501.415 155: HSG 970501.675 <143 Wnt 970501.904 <155 JEN 970502.005 152 POY 970502.376 155: HSG 970502.974 147 POY 970503.267 143 HSG 970505.187 154: HSG 970506.183 155: HSG 970506.928 155 POY 970507.877 168 JEN 970508.242 151 HSG 970509.060 155 POY 970510.206 142 HSG 970511.035 153 POY A significant difference between observers of different longitudes seems to suggest the short-term variation less than 1 day continues to exist. Observations of dense coverage are highly encouraged during the present state of large-amplitude high/low transitions in order to verify the suggested relation of this system to SU UMa stars. Regards, Taichi Kato