PURPOSE: To compare the performance of phonological working memory in children with phonological disorders. Case presentation: A total of 18 children with phonological disorders, aged between 4 years and 7 years, underwent audiological and speech screening to identify their phonological level with evaluation of their orofacial aspects and any speech and language impairments. Phonological working memory was evaluated using the Pseudoword Repetition test (Santos and Bueno, 2003). The response of the children were recorded and transcribed phonetically. A response was considered correct when the child repeated the pseudoword correctly or when replacements were made that was in accordance with their phonological system. The results obtained from the phonological working memory test of children with phonological disorders were compared with those obtained from a validation population according to age. The children with phonological disorders showed poorer performance in the test stimuli with 2, 3, 4, and 5 syllables across all age groups except for the 2 syllable stimulus at ages 4 and 7. Test performance improved with age, but the average remained lower than that of the validation sample of children with normal phonological development. CONCLUSION: Poorer performance on the phonological working memory test by the children with phonological disorders may be making the process of phonological information briefer and more inadequate, contributing to the delay in the acquisition of phonemes.