Method for converting olefin or alcohol and method for producing propylene or aromatic compound

A method for converting an olefin or an alcohol, comprising:

• a pretreatment step of obtaining a conductive catalyst, which has an electrostatic deposition rate of less than 15 mass %, by
• charging a fluidized bed reactor with a non-conductive catalyst having an electrostatic deposition rate of 15 mass % or more,
• supplying a heated hydrocarbon gas to the fluidized bed reactor, and
• depositing a conductive substance comprising carbon on the non-conductive catalyst;
• and
• a step of converting the olefin or the alcohol by a fluidized bed reaction using the conductive catalyst,
• wherein, in the pretreatment step, a gas supply rate is 0.40 m/sec or less in terms of gas flow rate in the fluidized bed reactor, and
• in the step of converting the olefin or the alcohol, a gas supply rate is 0.5 m/sec or more in terms of gas flow rate during the fluidized bed reaction.