Being able to sustain attention for longer without mind-wandering would improve our performance. The brain correlates underlying both sustained attention and mind-wandering – the so-called sustained attention and default mode networks, respectively – have been well identified. Nevertheless, this knowledge has not yet been translated in advanced brain-based attention training protocols. Here we propose to use a novel brain imaging technique based on real-time fMRI to provide participants with information about ongoing levels of activity. We thus purpose a neurofeedback training of this difference between brain networks, what could lead to a boost in sustained attention ability, which is not reported yet.