 Attention Deficit Hyperactivity Disorder ADHD is a mental condition originating in childhood, characterized by symptoms of lack attention, hyperactivity and impulsiveness associated with significant functional impairment. Currently, the use of neurofeedback as a non-drug alternative technique for treatment of ADHD has increasingly spread among the clinical and academic fields, producing relevant findings with regard to its effectiveness. The SCP Neurofeedback and EEG Neurofeedback have been the most studied techniques until the moment, with equipments and systems made available to the market at prices between US 10.000 and US 20.000, while NIRS Neurofeedback equipments can be found for around US 2.000. Due to the low cost of the necessary equipments and easy access to the technology, the use of NIRS Neurofeedback was opted for in the search to evaluate the techniques effectiveness in the improvement of ADHD symptoms as well as the patients cognitive performance. 