Teamwork includes team planning, team performance, and team evaluation. Teacher and her assistant mastered different knowledge, abilities, and motivation for work in the team, different habits, and wishes of professional growth. The quality depends on their mutual cooperation, as this is the only way for the team to be successful. Agreements and conversations are necessary for the team, as this is the only way for the team to reach commonly set goals. Forming a successful and efficient team is a long-term process. People differ in opinions and attitudes. Therefore, conflicts emerge which have to be solved regularly. Poor relationships and poor communication destroy the climate and diminish the efficiency of teams. Satisfying teamwork contributes to positive relationships and induces personal and professional growth of the members of the team. The empirical research was based on the two main research questions. We were interested in how the teacher and her assistant in the kindergarten sense their mutual relationship, and how the teacher and her assistant sense professional competencies in them and in each other. By research, we wished to get the insight into the relationships in the team of the department of the kindergarten, which is composed of the teacher and her assistant. In the empirical research, 100 professional workers employed in different kindergartens all over Slovenia were included. Their age, gender, education, seniority in the organization, and years of service were various. The pattern included team members in the department of the kindergarten, i.e. the teacher and the assistant of the teacher, in every selected department. I acquired data by means of my own survey questionnaire which included the closed, the open and the combined type of questions and rating scales. I encrypted the questionnaires for the members of the same team in combination. I tested the questionnaire in the pilot study and verified its measurement characteristics. I could not verify statistically important differences in sensing the relationships in the teamwork between the teachers and their assistants. I discovered the statistically important connection between sensing equivalent division of work and the quality of the relationship – those professional workers who sense the better relationship between them divide work more equally.