Prader-Willi syndrome (PWS) is a rare, genetically determined disorder, most often resulting from a deletion of chromosome 15, usually occurring as a result of a de novo mutation, regardless of gender. Symptoms of the syndrome include muscle hypotonia in early life, hyperphagia (excessive appetite), which can lead to obesity, hormonal disorders, psychomotor and speech development delays, and cognitive and behavioral disorders. From a speech therapist’s point of view, a child diagnosed with this syndrome requires multifaceted support from as early as possible in life, due to characteristic structural and functional disorders. From a speech therapist’s point of view, a child diagnosed with this syndrome requires multifaceted support from as early as possible in life, due to characteristic disorders in the structure and functioning of the orofacial sphere, abnormalities in primary functions, including feeding disorders, as well as complex problems in psychomotor development.