This work was done with mamey sapote fruits (Pouteria sapota) during two productive cycles (february, 96-may, 97 and february, 97-may, 98). The objective was to evaluate some changes ocurring during development and postharvest of the mamey sapote fruit. Vari-ables measured were: respiration, weigth loss, flesh color (color index, CI), firmness, total solubles solids (tss), acidity (malic acid), hu-midity and sugars. The evaluations were at harvest and after 7 days on environmental storage conditions. The fruit harvested after 400 days after flowering (DAF) had the next caracteristics: flesh color was yellow-red to red (CI =6-16), firmness was 55-65 N, tss was 10-12 %, acidity was 0.15-0.20 %, humidity was 67-72 % and total sugars were 3-4.5 %. After 7 days, the parameters were: respiration showed a climateric rise (3-5 days after harvest) with 121.5 mlkg-1h-1 of CO2 (232°C, 50% R.H) and the weigth loss was 10-14.6 %. The flesh color was red (I C=12-21.5), firmness was 3-12 N, tss was 25-34 %, acidity was 0.10.14-0.20 %, humidity was 63-67 %, and total sugars were 20-22 % (nonreducing sugars represented more than 70 %).