An insulated wire that includes an insulating layer containing crosslinked silicone rubber and that has good wear resistance and good gasoline resistance is provided. In an insulated wire obtained by covering a conductor with an insulating layer containing crosslinked silicone rubber, the crosslinked silicone rubber has an inter-crosslinking molecular weight of 2000 or less. It is preferable that the insulating layer has a Shore A hardness of at least 50 as measured in accordance with JIS K6253. The insulating layer may further contain calcium carbonate powder, magnesium oxide powder, magnesium hydroxide powder, and the like.