A medical device includes a long shaft member, a curved portion configured to be curved, a support member that is configured to be deformed along a curved shape of the curved portion, a guide member that extends from a distal end of the curved portion, and a linear member that includes a connection portion connected to the guide member, the linear member being inserted into the support member, and that pulls the guide member in accordance with a change of the curved shape. A central axis of the guide member is positioned apart from the central axis of the support member. The linear member which protrudes from the support member is inclined with respect to a longitudinal axis of the guide member and is connected to the connection portion.
