Mechanically deboned chicken meat (MDCM) is a raw material produced with specific mechanical deboning equipment using cheaper chicken parts such as the back, the neck and meat clinging to the bones. Mechanical separation changes the composition of the original raw material, resulting in meat with higher fat and mineral contents; then, determination of proximate and mineral composition of MDCM obtained from different chicken parts, lots and suppliers permitted evaluation of the variability of raw material used in manufacture of chicken meat products. The objective of this work was to study the possible variations on composition of MDCM derived from different suppliers and different chicken parts using principal component analysis. The results obtained were interpreted using multivariate analysis and showed that there is variability among the raw materials, especially in respect of different chicken parts and different manufacturing lots. The proximate and mineral compositions of MDCM products were affected especially by processing conditions.