This paper presents the results of an experimental analysis of the duralion of Spanish consonants. The influence of three different factors—stress, location on the/nsyllable, and pause vicinity— on the duration of consonants in reading text has been studied. Phonetic context and speech rate have also been controlled. The obtained results seem to indicate that the vicinity of a pause and the location of the consonant in the syllable have a systematic effect on all the consonants, while the stress only affects the duration of a rcduced set of voiced/nallophones ([1], [r] and [n]). Some general conclusions about the mean duration of each consonant, and about the relationship between duration and voicing, manner and place of articulation, have also been established.