The main purpose of the article is to draw attention to the need for cooperation between a family assistant and a speech therapist, which rarely occurs. An assistant is another profession called to work with a family in the area of support. "The main task of an assistant is to support parents in the proper fulfillment of their caring and educational functions and shaping the skills of family members in finding solutions to life difficulties" (Krasiejko, 2016, p. 5). Therefore, work in this profession requires continuous expansion of competences and their adaptation to the needs of those under their care. The article introduces one of the topics that a family assistant can meet in his work and which can be a challenge for him, mainly the topic of the correct and incorrect development of a child's speech. Stages of speech development were discussed, with particular attention to preschool children. The presented description of the course of speech development (normative - delayed - disturbed) will allow the family assistant to catch an early deviation from the norm, draw the child's guardians attention to the need for a speech therapy assessment of speech development and to help in organizing consultations with a speech therapist. As a result of the examination, the speech therapist will decide whether to start therapy and refer you to specialist examinations (e.g. audiological, ENT, orthodontic, psychological).