A transmission-type electronic pen used with a position detecting device, the transmission-type electronic pen comprising: a tubular casing comprising a case main body and a front cap; a core body arranged in the casing such that a tip thereof protrudes to external from one opening of the casing; a supply source of a source voltage arranged in the casing; a transmission circuit that transmits a signal supplied to the position detecting device; pressure detecting unit configured to detect whether a pressure is being applied to the tip of the core body; detection unit configured to detect a direct act of a user to the casing, serving as a trigger for start of use of the transmission-type electronic pen, wherein contact of a human body such as a hand or finger of the user with the case main body or the front cap is detected as the direct act of the user to the casing, or contact of a human body such as a hand or finger of the user with the case main body or the front cap and a motion of the transmission-type electronic pen by the user are detected in combination as the direct act of the user to the casing; and control unit configured to activate the transmission circuit and further configured to control transmission operation of the transmission circuit based on a detection output of the detection unit and a detection output from the pressure detecting unit, wherein the transmission circuit is controlled to any of a plurality of kinds of transmission operation states including at least a transmission operation state of power saving when being activated, wherein a power saving mode is a mode in which the transmission circuit is in a transmission operation state with low power consumption, and when detecting the direct act of the user by the detection unit, the control unit activates the transmission circuit and carries out control to cause the transmission circuit to carry out transmission operation in a first transmission operation state that is any of the plurality of kinds of transmission operation states, wherein the control unit activates the transmission circuit in the power saving mode of transmission operation and starts the first transmission operation state when detecting that a pressure is being applied to the tip of the core body by the pressure detecting unit. a tubular casing comprising a case main body and a front cap; a core body arranged in the casing such that a tip thereof protrudes to external from one opening of the casing; a supply source of a source voltage arranged in the casing; a transmission circuit that transmits a signal supplied to the position detecting device; pressure detecting unit configured to detect whether a pressure is being applied to the tip of the core body; detection unit configured to detect a direct act of a user to the casing, serving as a trigger for start of use of the transmission-type electronic pen, wherein contact of a human body such as a hand or finger of the user with the case main body or the front cap is detected as the direct act of the user to the casing, or contact of a human body such as a hand or finger of the user with the case main body or the front cap and a motion of the transmission-type electronic pen by the user are detected in combination as the direct act of the user to the casing; and control unit configured to activate the transmission circuit and further configured to control transmission operation of the transmission circuit based on a detection output of the detection unit and a detection output from the pressure detecting unit, wherein the transmission circuit is controlled to any of a plurality of kinds of transmission operation states including at least a transmission operation state of power saving when being activated, wherein a power saving mode is a mode in which the transmission circuit is in a transmission operation state with low power consumption, and when detecting the direct act of the user by the detection unit, the control unit activates the transmission circuit and carries out control to cause the transmission circuit to carry out transmission operation in a first transmission operation state that is any of the plurality of kinds of transmission operation states, wherein the control unit activates the transmission circuit in the power saving mode of transmission operation and starts the first transmission operation state when detecting that a pressure is being applied to the tip of the core body by the pressure detecting unit.