Objective: To characterize the speech parameters in patients with chronic obstructive pulmonary disease (COPD). Materials and methods: A prospective case-series study. All patients underwent an evaluation of the following speech parameters: maximum phonation time, oral-motor control, articulation, reading, verbal diadochokinesia, and automatic speech. The mean, median and standard deviation of these parameters were determined using SPSS software version 23. Results: Twenty (20) subjects (7 males and 13 females) whose average age was 64.4 ± 9.1 years entered the study. The speech parameters showed a reduction in the maximum phonation time (MPT) in /s/ 6.58 ± 6.76, /a/ 7.29 ±5.08, /i/ 8.24 ± 5.72. The same happened in the repetition tasks: /pa/ 12.60 ± 3.36, /ta/ 13.40 ± 3.4, /ka/ 12 ±4.11, and the number of words per minute accounted for 109 ± 26.25. Conclusions: The study re...