The mean lifetimes of the 1796, 2784, 3333 and 4138 keV levels of 26Si have been measured using the Doppler shift attenuation method. The ratios of neutron to proton transition matrix elements determined from these data and additional data from mirror transitions in 26Mg are compared with recent data from inelastic pion scattering and with shell model calculations. The isoscalar strenghts are compared with α-scattering data.