The distannylytterbium complex (Ph3Sn)2Yb(THF)4 was obtained by reaction of naphthaleneytterbium with Ph4Sn. According to X-ray data this molecule has a distorted octahedral structure. The Yb atom is bonded with four oxygen atoms of THF molecules which are on the equatorial plane and with two Sn atoms of Ph3Sn groups in axial positions. The Sn-Yb distances are equal 3.305(1) angstrom, the SnYbSn angle is 164.5(1)-degrees. Crystals are monoclinic with space group C2/c and unit cell dimensions a 16.190(3), b 15.903(3), c 19.066(4) angstrom, beta-98.91(3)-degrees, Z 4, D(c) 1.59 g cm-3. The same complex was obtained in low yield in the reaction of napththaleneytterbium with Ph6Sn2. Tetraphenylgermane does not react with C10H8Yb(THF)x.