diff --git a/lib/Plot.cpp b/lib/Plot.cpp
index aaee552..c51c338 100644
--- a/lib/Plot.cpp
+++ b/lib/Plot.cpp
@@ -327,6 +327,17 @@ void Color::operator()(PlotOptions &option) const
     option.lineColor = color_;
 }
 
+// LineWidth constructor ///////////////////////////////////////////////////////
+LineWidth::LineWidth(const unsigned int width)
+: width_(width)
+{}
+
+// LineWidth modifier //////////////////////////////////////////////////////////
+void LineWidth::operator()(PlotOptions &option) const
+{
+    option.lineWidth = static_cast<int>(width_);
+}
+
 // LogScale constructor ////////////////////////////////////////////////////////
 LogScale::LogScale(const Axis axis)
 : axis_(axis)
@@ -440,6 +451,7 @@ void Plot::initOptions(void)
     options_.label[0]     = "";
     options_.label[1]     = "";
     options_.lineColor    = "";
+    options_.lineWidth    = -1;
     options_.palette      = Palette::category10;
 }
 
@@ -470,6 +482,11 @@ Plot & Plot::operator<<(PlotObject &&command)
             commandStr         += " lc " + options_.lineColor;
             options_.lineColor  = "";
         }
+        if (options_.lineWidth > 0)
+        {
+            commandStr         += " lw " + strFrom(options_.lineWidth);
+            options_.lineWidth  = -1;
+        }
         if (options_.title.empty())
         {
             commandStr += " notitle";
diff --git a/lib/Plot.hpp b/lib/Plot.hpp
index 478c289..e62ebde 100644
--- a/lib/Plot.hpp
+++ b/lib/Plot.hpp
@@ -189,6 +189,7 @@ struct PlotOptions
     Range                    scale[2];
     std::string              label[2];
     std::string              lineColor;
+    int                      lineWidth;
     std::vector<std::string> palette;
 };
 
@@ -241,6 +242,19 @@ private:
     const std::string color_;
 };
 
+class LineWidth: public PlotModifier
+{
+public:
+    // constructor
+    explicit LineWidth(const unsigned int width);
+    // destructor
+    virtual ~LineWidth(void) = default;
+    // modifier
+    virtual void operator()(PlotOptions &option) const;
+private:
+    const unsigned width_;
+};
+
 class LogScale: public PlotModifier
 {
 public: