School assessment is an indispensable part of the teaching process. There are different opinions in the society about school assessment and in this master thesis parents opinions on assessment in teaching will be explored. The diploma thesis "Parents' opinions on the assessment of primary school students" contains two parts: the theoretical part and the empirical part. The theoretical part presents school docimology and professional terminology that is closely related to it. Furthermore, the purpose of assessment, the functions of assessment, the principles and models of assessment and what is actually assessed in school are presented.The problems of subjective assessment are described and the topic of parenting and assessment is briefly presented. The empirical part presents the results of a research in which the parents of primary school students participated. The aim of the study was to examine whether there are statistically significant differences in parents' opinions on the assessment of primary school students with regard to gender, place of residence and educational level. Also, parents opinions on causing stress during numerical assessment and on the abolition of grades in the classroom with regard to sociodemographic characteristics were examined. The results of the research prove that there are no statistically significant differences in parents' opinion on the assessment of primary school students, opinion on causing stress in numerical assessment and on the abolition of numerical grades in primary education with regard to sociodemographic characteristics. Additionally, parents opinions on stress induction during numerical assessment were examined with regard to the grade their child is attending and a statistically significant difference was found. According to parents, parents of children in the first grade and their children partially do not experience stress during the numerical assessment.