Within the unsaturated zone, a steep excavated surface can be sustained for some unknown but finite time, and some slopes may remain stable for extended time periods due to capillary forces. These observations clearly indicate small but non-zero values for attraction strengths (cohesion and tensile strength) in unsaturated sands. The relationship between attraction strengths is often considered by Mohr-Coulomb and Chen & Drucker models. However, for small compressive stress ranges (less than tens of kPa) and particularly in the tensile stress regime, the Mohr-Coulomb criterion often can not be accurately used for representing the behavior of sand. To find out the relationship between cohesion (one of shear strength terms) and tensile strength, uniaxial tensile and direct shear tests were carried out in moist sands (D_r = 30 %). Tensile strength, which is significantly different from zero, increases with increasing moisture content. Apparent cohesion strength is also identified in moist sands. A simple relationship between tensile strength and apparent cohesion is proposed using the obtained data.