The diploma thesis deals with complex diagnostics of a pupil with mild intellectual disability. It is divided into two parts, theoretical and empirical. In the theoretical part is described mental disability with a focus on its mild form, specific learning disabilities and current situation concerning education of pupils with special education needs in primary education with a focus on these types of disabilities. The empirical part of the thesis summarizes the knowledge gained through interviews from consultants of school advisory facilities and teachers of common schools. It deals with the complex process of diagnostics of pupils with mild mental disabilities, the process of diagnostics of specific learning disorders of these pupils and the impact of diagnostics on the educational process of pupils.