A mold for manufacturing a resin container having a grip portion by blow molding in which a cylindrical bottomed preform is inserted into a cavity, the mold comprising: a rotary member rotatably attached to a mold main body about a bearing portion, the rotary member including: a protruding grip forming portion configured to form the grip portion in a portion of the container by pressing a portion of the preform that inflates during blow molding; and a first engagement portion formed between the bearing portion and the grip forming portion; and a linear actuator including a pressing portion having a second engagement portion engaged with the first engagement portion, the linear actuator being configured to press and rotate the rotary member by moving the pressing portion forward toward the cavity so as to move the grip forming portion from a standby position to a pressing position; characterized in that: the first engagement portion is an elongated cam hole; the second engagement portion is a loose fit member engaged with the cam hole; and in the pressing position, a contact point between the cam hole and the loose fit member is located on a straight line that passes through a center of the loose fit member and extends in the direction where the pressing portion is moved forward toward the cavity so as to move the grip forming portion from the standby position to the pressing position. a rotary member rotatably attached to a mold main body about a bearing portion, the rotary member including: a protruding grip forming portion configured to form the grip portion in a portion of the container by pressing a portion of the preform that inflates during blow molding; and a first engagement portion formed between the bearing portion and the grip forming portion; and a protruding grip forming portion configured to form the grip portion in a portion of the container by pressing a portion of the preform that inflates during blow molding; and a first engagement portion formed between the bearing portion and the grip forming portion; and a linear actuator including a pressing portion having a second engagement portion engaged with the first engagement portion, the linear actuator being configured to press and rotate the rotary member by moving the pressing portion forward toward the cavity so as to move the grip forming portion from a standby position to a pressing position; characterized in that: the first engagement portion is an elongated cam hole; the second engagement portion is a loose fit member engaged with the cam hole; and in the pressing position, a contact point between the cam hole and the loose fit member is located on a straight line that passes through a center of the loose fit member and extends in the direction where the pressing portion is moved forward toward the cavity so as to move the grip forming portion from the standby position to the pressing position. the first engagement portion is an elongated cam hole; the second engagement portion is a loose fit member engaged with the cam hole; and in the pressing position, a contact point between the cam hole and the loose fit member is located on a straight line that passes through a center of the loose fit member and extends in the direction where the pressing portion is moved forward toward the cavity so as to move the grip forming portion from the standby position to the pressing position.