Present study was designed to evaluate the performance of newly developed tomato advance genotypes and to investigate their yield stability across a range of environments over two consecutive years. Ten genotypes (8 new promising lines and two check cvs were grown at five different environments. in a randomized complete block design with three replications to determine the Phenotypic and genotypic stability. These Egyptian environments were Kaha, 2015 (Kalubia Governorate);  Kaha, 2016 (Kalubia Governorate); El Tal El Kabier, 2015 (Ismailia Governorate); El Tal El Kabier, 2016 (Ismailia Governorate) and Dokki, 2016 (Giza Governorate). Combined results showed that line Z₅ produced significantly high mean values for each of earliness, fruit firmness and fruit yield than other studied genotypes, ranked first over all sites in both years andexhibited average stability and it can be recommended for favorable environments. It was concluded that both promising lines G₃ and Z₃ exhibited high stability of yield and both total soluble solids and fruit firmness where the regression coefficient (b_i) was near unity with low deviation from the regression (non-significant, S²d_i). Therefore, both genotypes G₃ and Z₃ were found to be the most stable genotypes for all the environments and strongly recommended for planting at multi location trials. A₂, Super strain-B, Z₄₂ and G₅ are considered as genotype with low stability. G₅ appeared to be more productive under unfavorable environments for plant height, days to flowering, fruit firmness, fruit length, fruit diameter, No. locules/fruit, fruit weight and fruit yield.