A lubricant according to one embodiment includes a first ingredient and a second ingredient, said first ingredient as the main constituent being a first perfluoropolyether compound represented by the formula (1) which has a weight-average molecular weight of 500 to 6000 and a dispersity smaller than 1.3, and said second ingredient being a second perfluoropolyether compound which has a weight-average molecular weight of 500 to 6000 and has 6 to 10 hydroxyl groups (on average) in one molecule, Rt-Rf1-Rt   (1) where, Rf1 denotes a perfluoropolyether chain represented by the formula (2) and Rt denotes a terminal group represented by the formula (3), —CF2O—[(CF2CF2O)m—(CF2O)n]—CF2—  (2) where, m and n each denote a natural number,