To provide a variable valve timing device surely setting a valve timing phase at optimum timing in an overall operation range without a change of cam torque fluctuation characteristics of a camshaft even if an external environment temperature is extremely low and securing stable operation.

A cam journal bearing 12 includes a bearing holding case 21 holding needle bearings 19, 20 and fixed to a cylinder block 2. The needle bearings 19, 20 include a plurality of needle rollers 19a, 20a, and housings 19b, 20b rotatably retaining the plurality of needle rollers 19a, 20a. The bearing holding case 21, the plurality of needle rollers 19a, 20a, and the housings 19b, 20b are formed out of metal having roughly the same thermal expansion coefficients and containing iron.