The peach root borer, Capnodis carbonaria infests the roots of peach trees in North Sinai Governorate. The mean number of deposited eggs/ female under laboratory conditions was 47.05±0.73 eggs. The mean of incubation period was 9.5±0.96 days. The mean durations of larval, prepupal and pupal stages were 313±1.73, 14.2±0.08 and 17.6±0.09 days, respectively. Under laboratory conditions, C.carbonaria had one generation yearly. The seasonal activity of beetles showed two peaks; at the first half of April and second half of August, 1995 and at the first half of May and first half of September 1996.