Background. Sarcopenia is an age–related decrease in muscle strength, mass, and function. The risk of developing sarcopenia is higher in patients with type 2 diabetes mellitus (DM2), therefore, the assessment of skeletal muscle parameters is especially important in patients with DM2. The phase angle (PhA), which is calculated as a result of the analysis of bioelectric impedance parameters (BIA), can be an informative indicator not only of muscle mass, but also of muscle function. However, the clinical significance of PhA in patients with DM2 has not been fully studied. Aim. Evaluation of the association of PhA with muscle mass, muscle strength and physical performance in patients with DM2. Materials and methods. A single-stage cross-sectional study included 160 patients with DM2 (102 men; 58 women) aged 65 to 89 years. The study of the compositional composition of the body was carried out by the bioimpedance method. PhA and appendicular skeletal mass index (IASMM) were measured using BIA, handgrip strength with a hand dynamometer. A Short Physical Performance Battery (SPPB) test was performed. Results. In the one-dimensional analysis, PhA correlated with IASMM, handgrip strength and SPPB, and in the multiple regression analysis, PhA correlated with IASMM and handgrip strength. Conclusions: PhA is an informative parameter associated with sarcopenia in geriatric patients with type 2 diabetes mellitus.