Purpose: The present study was conducted to determine if the relationship between sentence complexity and childhood stuttering is influenced by grammatical development. The study was cross-sectional in design and observed the spontaneous speech of 6 children who stutter ranging in age from 32 to 46 months. Method: The first 100 utterances from each child's sample were scored using H. Scarborough's (1990) Index of Productive Syntax (IPSyn) and were given a numeric score that was used as an indicator of grammatical development in place of the child's age. The first 100 sentences containing a noun and verb in subject-predicate relation- ship were extracted from each sample and coded for their sentence complexity using L. L. Lee's (1974) Developmental Sentence Scoring. The utterances were also measured for length in morphemes. Sample utterances were then separated into two categories: fluent and stuttered. Results: Results showed that when conducting group comparisons, the mean complexity levels of fluent and stuttered utterances were significantly different. The difference in complexity levels of the fluent and stuttered