An electric outboard motor comprising: An operating device (100,200) designed so that a steering bar-shaped handle projecting forward is provided and is pivotally supported on a hull to be able to steer right and left, a propeller is driven by an electric motor driven by power supplied from a power supply, and on a tip portion of the steering bar-shaped handle, an accelerator grip that pivots on an axial center to one direction side and to the other direction side from a neutral position, the pivot to one direction side set as normal pivot and the pivot to the other direction side set as reverse pivot, to adjust an amount of power to be supplied to the electric motor according to a pivot amount is provided, wherein said operating device (100, 200) includes an accelerator grip fixing mechanism (101, 201) including: an engaging part (102, 202) of the accelerator grip; a locking piece (103, 203) that is formed to enable an engaging position where the locking piece (103, 203) projects from the tip portion of the steering bar-shaped handle to engage with the accelerator grip to make the accelerator grip incapable of pivoting and a releasing position where the engagement is released so as to enable the accelerator grip to pivot by going backward from the engaging position to appear and disappear easily; a biasing member (104, 204) that constantly biases the locking piece (103, 203) toward the engaging position side; and a lock releasing button (105, 205) that biases the locking piece (103, 203) toward the releasing position side to release the fixation of the accelerator grip, and said operating device (100, 200) normally brings the accelerator grip fixing mechanism (101, 201) into a lock state at the neutral position to hold the accelerator grip fixing mechanism (101, 201) in the accelerator grip or in the vicinity of the accelerator grip. An operating device (100,200) designed so that a steering bar-shaped handle projecting forward is provided and is pivotally supported on a hull to be able to steer right and left, a propeller is driven by an electric motor driven by power supplied from a power supply, and on a tip portion of the steering bar-shaped handle, an accelerator grip that pivots on an axial center to one direction side and to the other direction side from a neutral position, the pivot to one direction side set as normal pivot and the pivot to the other direction side set as reverse pivot, to adjust an amount of power to be supplied to the electric motor according to a pivot amount is provided, wherein said operating device (100, 200) includes an accelerator grip fixing mechanism (101, 201) including: an engaging part (102, 202) of the accelerator grip; a locking piece (103, 203) that is formed to enable an engaging position where the locking piece (103, 203) projects from the tip portion of the steering bar-shaped handle to engage with the accelerator grip to make the accelerator grip incapable of pivoting and a releasing position where the engagement is released so as to enable the accelerator grip to pivot by going backward from the engaging position to appear and disappear easily; a biasing member (104, 204) that constantly biases the locking piece (103, 203) toward the engaging position side; and a lock releasing button (105, 205) that biases the locking piece (103, 203) toward the releasing position side to release the fixation of the accelerator grip, and said operating device (100, 200) normally brings the accelerator grip fixing mechanism (101, 201) into a lock state at the neutral position to hold the accelerator grip fixing mechanism (101, 201) in the accelerator grip or in the vicinity of the accelerator grip. an engaging part (102, 202) of the accelerator grip; a locking piece (103, 203) that is formed to enable an engaging position where the locking piece (103, 203) projects from the tip portion of the steering bar-shaped handle to engage with the accelerator grip to make the accelerator grip incapable of pivoting and a releasing position where the engagement is released so as to enable the accelerator grip to pivot by going backward from the engaging position to appear and disappear easily; a biasing member (104, 204) that constantly biases the locking piece (103, 203) toward the engaging position side; and a lock releasing button (105, 205) that biases the locking piece (103, 203) toward the releasing position side to release the fixation of the accelerator grip, and said operating device (100, 200) normally brings the accelerator grip fixing mechanism (101, 201) into a lock state at the neutral position to hold the accelerator grip fixing mechanism (101, 201) in the accelerator grip or in the vicinity of the accelerator grip.