The aim of this study is to examine the speech disfluencies observed in the middle school students according to their age and gender variables. The sample of the study consisted of students studying at the Ticaret Borsası Ortaokulu 6th, 7th and 8th grades (12-14 years) in the province of Izmir, district of Bayraklı. Power analysis was performed for the sample and it was identified as 60 students. The distribution of groups in each class is equally organized. Via face to face interviews, speech samples of at least 300 words of each participant were recorded and transcribed The obtained data were analyzed by means of statistical methods. According to findings of the research, the age and gender of the students significantly affect the fluency problems observed in their speech. When examined by class level (age), it was determined that fluency was the most problematic in the 6th grade students, and the fluency problem in the 7th and 8th grade students is less. When examined by gender, there was no significant difference in total for speaking of 6th and 7th grade female and male students, according to the average of disfluency types. In the 8th grade, there was a significant difference between the female students and the male students in total, in terms of fluency problem averages, and it was determined that the female students had more disfluency in their speech. These findings are thought to be guiding in determining.