This study examines a number of acoustic characteristics of the weakening of occlusives in French in the speech of people with Parkinson’s disease. The results confirm an increase in reduction processes in the parkinsonian speech compared to what is known as normal speech. In the parkinsonian speech, occlusives have a lower level of energy and slightly shorter outputs; they are characterised by the absence of explosion, the presence of noise and a high number of formers; they are also more often omitted. The weakening of occlusives, which is a consequence of speech production deficits due to Parkinson’s disease, is influenced by the inherent articulating characteristics of consonants.