In semiotics, syntagmatic analysis is analysis of syntax or surface structure (syntagmatic structure) as opposed to paradigms (paradigmatic analysis). This is often achieved using commutation tests.

"Syntagmatic" means that one element selects the other element either to precede it or to follow it. For example, the definitive article "the" selects a noun and not a verb.

Of particular use in semiotic study, a syntagm is a chain which leads, through syntagmatic analysis, to an understanding of how a sequence of events forms a narrative. Alternatively, syntagmatic analysis can describe the spatial relationship of a visual text such as posters, photographs or a particular setting of a filmed scene.

Roland Barthes was able to use metaphor in the form of various garments in order to display how the syntagm/paradigm relationship worked together to at once create and change meaning. Expanding on this form of explanation by Barthes, both David Lodge and Susan Spiggle have further developed the metaphor, using specific wearable items. Shirt, shorts and sandals for example, are freely interchangeable along the plane of tops, bottoms and footwear, the paradigmatic plane, assuming they follow the rules of wearable items, the syntagmatic plane. While you can change the sandals for high heels, it would be breaking the rules to wear them as a top.