There is described a tubular insert for a magnetically inductive flowmeter, a production method for said type of tubular insert and a flowmeter. The tubular insert is made of, essentially, an electrically-insulating material, in particular, rubber, which is reinforced by a tubular molding part made of a dimensionally stable plastic which is based on polymers, at least in a measuring section. The tubular molding part is embedded in the electrically-insulating rubber material by a press or casting method such that the electrically-insulating, rubber material essentially covers the inner surfaces of the tubular molding part. An economical to produce, robust, tubular insert is thus achieved.