Leaf rust (Puccinia triticina Eriks.) and stem rust (Puccinia graminis f. sp < em>. tritici) have been considered to be the most common rust diseases of wheat. Twelve Egyptian wheat cultivars were evaluated for resistance at seedling stage using four slow rusting components i.e. incubation period, latent period, pustule density /cm² and pustule size/mm². Additionally three parameters of slow rusting resistance at adult plant stage, rust reaction, infection response and rust severity (%). Rate of leaf and stem rust increase (r-value) and area under disease progress curves (AUDPC) were determined under artificial infection with the single race of the two fungi at the adult plant stage in greenhouse experiments. The five cultivars; Misr 3, Sids 12, Shandweel 1, Sakha 94 and Gemmeiza 12 showed low values of incubation period, pustule density/cm², pustules size/mm², infection response, r-value and AUDPC to wheat leaf and stem rust due to characterized as  slow rusting resistance cultivars.  Also, the cultivar Giza 168 showed complete resistance to leaf and stem rust, while, the two cultivars Misr 1 and Beni Sweif 5 showed slow rusting to leaf rust but characterized as highly susceptible and fast rusting cultivars to stem rust. Correlation between latent period and area AUDPC was negative and strong (r = 0.70) in leaf rust but in stem rust was (r = 0.46). Thus the slow rusting resistant wheat cultivars can be used for developing high-yielding with more durable resistance to leaf and stem rust diseases in bread wheat.