The aim of this study was to verify if there is a difference in performance between children with Developmental Language Disorder (DLD) and typical language development (TLD) in phonological working memory (PWM) test and visual short-term memory (VSTM), and if this performance is correlated with the result of a receptive vocabulary test. We selected 14 children with DLD and 28 with TLD. All subjects underwent two short-term memory tests and a receptive vocabulary test. The comparison between the groups was performed using the Student's t-test, and the correlation between the short-term memory and the vocabulary was obtained by Pearson's correlation. Children with DLD had a worse performance when compared with the control group, both in PWM and VSTM. The positive correlation between memory and vocabulary tests suggests that both the phonological loop and visual memory are important for the processing of language, even if the phonological loop may have greater relevance.