Soil historical sites are damaged due to dryness, precipitation of salts and luxuriance molds as well as lichens on the surface. To minimize the damage, hydrophilic polymers have been used to control the evaporation of water from soil at exposed soil structural remains. However, few researches have studied the effects of the hydrophilic polymers on evaporation from soils. The objectives of this study were 1) to investigate experimentally the effects of hydrophilic polymers, such as polysiloxiane-polyoxyalkyleneoligomer (SAO) and polyethylene glycol (PEG) on water movement in Tachikawa loam, and 2) to validate a surface-resistance-type model of evaporation from bare soil to predict evaporation after applying SAO and PEG. Each hydrophilic polymer was applied on the soil surface causing the development of changes in water retention and the decrease of the vapor pressure. The soil tested in an acryl cylindrical column was the Tachikawa loam (clay loam) and the testing polymers were, Polysiloxian– polyoxyalkyleneoligomer (SAO; molecular weight was 700) and polyethylene glycol (PEG; molecular weight was 400), with a set dry bulk density of 0.48 Mg m-3. Following the application of the polymers, the soil column was put in a chamber for evaporation. The inner chamber kept the temperature constant to 25C and relative humidity to 70%. To obtain the depth of polymer infiltration, we measured the water potential distribution in the soil column by using WP4-T (Decagon Device Inc.). The water potential distribution did not change until the 6th day despite the application of the polymers. The water potential distribution, of the SAO applied sample, changed at a depth of 0.75 cm from the surface, whereas the PEG applied sample changed at 1.25 cm. The unsaturated conductivities of the polymer infiltration layer were also calculated determining an unsaturated hydraulic conductivity of 1×10-13 cm s-1 at the SAO infiltration layer, and 1×10-12 cm s-1 in the PEG infiltration layer. Both, the volumetric water contents and the unsaturated hydraulic conductivities of the polymer samples decreased. We also carried out evaporation experiments under constant temperature and relative humidity and measured the water potential distribution in the polymer applied soil. From the distribution of the water potential in the soil, the depth of infiltration for SAO and PEG were determined to be 1.0 cm and 1.5 cm respectively. From the water potential distribution, the unsaturated conductivities of the polymer infiltration layer were 1×10-13 cm s-1 and 1×10-12 cm s-1 for the SAO and PEG respectively. Further work is also needed to evaluate the formation of polymers in soil pores.