Background: Mindfulness is getting more and more attention from psychological intervention contexts, but also from educational and organizational settings. As a consequence, there also is a growing need for tools to measure mindfulness. Objective: The aim of this work is to present the Spanish adaptation psychometric properties of the short version Freiburg Mindfulness Inventory (FMI), a test based on Buddhist tradition. Method: A sample of 543 participants (161 males and 379 females) with age average of 35.27 (SD = 13.66) and heterogeneous educational and occupational background was studied. Results: The scale internal consistency (α = .86, ω = .87) as well as construct validity evidences can be considered appropriated. Exploratory factorial analyses suggest the FMI items are clustered in two related factors, unconditional acceptance, and full attention, as opposed to the initially proposed unifactorial model. Conclusions: the FMI short version can be successfully used for clinical and research purposes although its factorial structure should be additionally tested.