Abstract: Commelina erecta (CE), popularly known as Santa Luzia herb or Blue Trapoeraba, is present in all Brazilian states and represents one of the main Commelinaceae family specie. This unconventional food plant (UFP) grows in natural environments without inputs and in the clearing of new areas. As CE has food representation in some populations its nutritional and functional properties should be studied. The aim of this study was to determine the mineral compositionof different CE parts. CE leaves and stemswere dehydrated (105 °C for 4 h), weighed (0.5 g) in a PTFE flask, added of 5 mL of HNO3 (65% m/v) and subjected to wet digestion in a closed microwave system (Multiwave GO, Anton Paar). Samples were filled up to 25 mL and diluted. The analytes (Ca, Cr, Cu, Fe, K, Mg, Mn, Na, and Zn) were determined by ICP-OES. The analysis accuracy procedure was perfomed using a standard reference material (Embrapa RM-Agro E1001 (FO-01/12), Brachiaria brizantha cv Marandu). The mineral content determined in leaves and stems (mg/100 g) were as follows [mean(relative standard deviation)]: (Ca) 806 (4%), and 813 (6%); (Cr) 0,31 (15%), and 0,20 (17%); (Cu) 3,61 (11%), and 1,83 (13%); (Fe) 826 (6%), and 191 (10%); (K) 5047 (1%), and 5351 (1%); (Mg) 427 (3%), and 353 (5%); (Mn) 28,59 3%), and 9,46 (6%); (Na) 17,26 (5%), and 13,53 (9%); (Zn) 10,83 (4%), and 10,54 (8%). The CE most abundant elements were K, Ca and Fe, which makes it a source of these minerals, especially Ca and Fe, which are consumed in smaller amounts than ideal by a large part of population. Furthermore, severe degree malnourished people may be deficient in Cr and Zn, and CE may be considered an alternative source of these micronutrients.