Studies analysing and comparing the attitudes of teachers towards Information and Communication Technologies (ICT) based on gender have provided mixed results. In this work, we carried out a meta analysis on gender differences in attitudes towards ICT, from a global perspective and exploring four dimensions: affective-emotional attitude, beliefs, self-efficacy, and mixed with each other. Through the collection of 55 studies providing 73 effect sizes based on a total sample of 21,325 working teachers, a negative effect was found, almost null (d= -0.0297) and not statistically significant. These results indicate that female teachers have a more positive attitude towards the educational use of ICT than male teachers. Independently, the dimensions affective-emotional attitude (d= -0.342), beliefs (d= 0.114), and self-efficacy (d= 0.273) produced significant effect sizes, although with small effects. The analysis of moderating variables showed that different moderators intervene significantly in the variability of effect sizes: continental origin of the teachers (emotional and beliefs dimensions); teacher's workplace (dimension self-efficacy); type of publication (emotional dimension) and validity of the instruments (emotional and beliefs dimension). With this meta-analysis, it is possible to take another step towards a better measurement and explanation of the attitudes that teachers have towards the use of new technologies in educational contexts.