This study aimed to develop a lead-free sealing glass applicable to sealing of the alkali-free glass included in 4K televisions and organic light-emitting diode digital displays. The sealing glass should ideally possess the following properties: (i) free of alkali metals, (ii) low inciting point, (iii) low thermal expansion and (iv) high water durability. To meet these requirements, we prepared glasses with combinations of four different metal oxides (V2O5, ZnO, TeO2 and (ZrO)(2)(HPO4)(2)) and evaluated their properties. Two types of lead- and alkali metal-free glasses (40wt% V2O5-10wt% ZnO-40 wt% TeO2-10 wt% (ZrO)(2)(HPO4)(2) and 40 wt% V2O5-8 wt% ZnO-40 wt% TeO2-12wt% (ZrO)(2)(HPO4)(2)) were found to have low inciting points, low thermal expansion coefficients and high water durability, However, further reduction of their thermal expansion coefficient was necessary for successful sealing of alkali-free glass. To this end, we incorporated ZWP (Zr-2(WO4)(PO4)(2)), a low thermal expansion ceramic filler, into the sealing glasses. This resulted in reduction of the thermal expansion coefficient and successful sealing of alkali-free glass. These results show that V2O5-ZnO-TeO2-(ZrO)(2)(HPO4)(2) glass is promising for sealing of 4K televisions and organic light-emitting diode digital displays.