The electrical conductivities of Na0.44Mn1-xTixO2 (x=0, 0.11, 0.22, 0.33, and 0.44) were measured by dc method and ac impedance method to reveal the effect of Ti substitution on the conductivity of Na0.44MnO2. The electronic conductivity decreased drastically with increasing x, in which activation energy increased from 0.38 to 0.53 eV, because of the decreasing number of the electron-hopping pairs of Mn3+-Mn4+. The ionic conductivity changed nonlinearly, exhibiting a maximum at x=0.22, in which activation energies were constant at around 0.58-0.61 eV. For this, it was suggested that the surface state of Na0.44Mn1-xTixO2 particles might influence the ionic conductivity.