We present here a study of electrical and thermoelectric properties of n- and p-Bi2Te3 microwires (n-type - Bi2Te2Se; p-type - Bi0.5Sb1.5Te3) with different diameters (d=10 – 20 μm). Cylindrical Bi2Te3 crystals with glass coating were prepared by the liquid phase casting in a glass capillary. The X-ray studies have shown that the microwire core is in general polycrystal consisting of big disoriented single crystal blocks of approximate size 10-15 μm. Measurements of resistance and thermopower were carried out over a wide range of temperatures (4.2 – 300 K) and magnetic fields (0-14 T). At 300 K for samples of n- and p-type the thermopower S and Power factor P.f.=S2σ were - (100 – 140) μV/K , 1.6*10-3 W/(K2*m) and (150 – 300) μV/K, 4.5*10-3 W/(K2*m) respectively. Magnetic field dependences of resistance and thermopower were measured at various temperatures (T=35, 100, 270 K) and different magnetic field orientations. A broad maximum is the dominant feature of the magnetic field dependence of Power factor for p-type samples, while Power factor decreases for n-type samples. We have obtained maximum Power factor P.f.=6.8*10-3 W/(K2*m) for p-type sample at longitudinal magnetic field B=3 T at T=100 K.[1] Magnetic field dependences of Power factor for Bi2Te3 microwires at different temperatures are shown in Fig. 1. Fig.1. Longitudinal (a) and transverse (b) magnetic field dependences of Power factor P.f.=S2σ for Bi2Te3 microwires at different temperatures. 1- p-type, Bi0.5Sb1.5Te3, D=30 μm, d=16.8 μm; 2- ntype, Bi2Te2Se, D=30.7 μm, d=17.3 μm. It is seen, that magnetic field has small influence of on the Power factor for a sample of n-type Bi2Te3, but the magnetic field strongly affects the properties of the p-type sample. It should be noted that in dependency of the Power factor vs. magnetic field for p-type sample there is a significant maxima within the range 2-3 T of the magnetic field, which is important for practical application. The transverse magnetic field influences a Power factor much more strongly. The maximal absolute value of the Power factor that we achieve under transverse magnetic field B=9.8 T equals 9.1x10-3 W/(K2*m) for p-type Bi2Te3 at temperature T=100 K.